A general solution of matrix to the system Ax = 0 in parametric vector form is given by: X = X_2 * [1 0 1 0 0] + X_3 * [0 1 0 1 0]
How to find all solutions of Ax = 0 in parametric vector form?
The matrix [2 -1 -4 2 6 -3] can be row-reduced to the row-echelon form [2 -1 -4 0 6 -9], which has a pivot in the first, second and fourth columns. This implies that the columns with zero entries in the row-echelon form correspond to free variables in the solution.
Since there are two free variables in the row-echelon form, the solution to the homogeneous linear system Ax = 0 will be in the form of a parametric vector, where X_2 and X_3 are the free variables and X_1, X_4, and X_5 are expressed in terms of X_2 and X_3.
A general solution to the system Ax = 0 in parametric vector form is given by the matrix
X = X_2 * [1 0 1 0 0] + X_3 * [0 1 0 1 0]
where X_2 and X_3 are arbitrary constants. This represents a two-dimensional subspace in R^5, which consists of all linear combinations of the two linearly independent vectors [1 0 1 0 0] and [0 1 0 1 0].
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this figure is made up of a rectangle and parallelogram. what is the area of this figure? enter your answer in the box. do not round any side lengths. units²
40 square units is the area of this rectangle figure .
What is a rectangle ?
A rectangle is a sort of quadrilateral with parallel sides that are equal to one another and four vertices that are all 90 degrees apart. Because of this, it is also known as an equiangular quadrilateral.
The term "parallelogram" can also be used to describe a rectangle because the opposing sides are equal and parallel.
the figure, the rectangle has the vertexes (2,1), (3,-3), (-5,-5) and (-6,-1). The parallelogram has the vertexes (2,7), (3,3), (3,-3), and (2,1).
The area of a parallelogram is base times height. We have 2 vertical lines at x=2 and x=3, so the height is 1. And the length of the line from (3,3) to (3,-3) is 6, so the base is 6. Therefore the area of the parallelogram is 1*6 = 6.
The rectangle is a tad trickier since it's not aligned with either the x or y axis. But we can use the Pythagorean theorem to get the lengths.
L = sqrt((2 - -6)^2 + (1 - -1)^2)
L = sqrt(8^2 + 2^2)
L = sqrt(64 + 4)
L = sqrt(68) = 2*sqrt(17)
W = sqrt((2-3)^2 + (1- -3)^2)
W = sqrt((-1)^2 + 4^2)
W = sqrt(1 + 16)
W = sqrt(17)
And the area is length * width, so:
2*sqrt(17)*sqrt(17) = 2 * 17 = 34
And the total area is the sum of the areas, so
34 + 6 = 40
So the area of the figure is 40 square units.
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may you guys be kind to help meh with it
a school is organizing a weekend trip to a nature preserve. for each student, there is a $50 charge, which covers food and lodging. there is also a $25 charge per student for the bus. the school must also pay a $15 cleaning fee for the bus. if the total cost of the weekend is $3,765, how many students will be going on the trip?
The total number of students going for the weekend trip as per the given total cost and other charges is equal to 50.
Let us consider 'n' be the number of students going for trip.
Per student charge for food and lodging = $50
Total food and lodging charges = $50n
Bus charges per student = $25
Total bus charges = $25n
Bus cleaning fees = $15
Total cost for the trip = $3,765
Equation formed for the above condition is:
$ (50n + 25n + 15 ) = $3,765
⇒ $ ( 75n + 15 ) = $3,765
⇒ 75n = 3,765 - 15
⇒ n = 3,750/ 75
⇒ n = 50
Therefore, there are 50 students going on the weekend trip.
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Which rational functions have an oblique asymptote? Check all that apply.
The rational functions that have an oblique asymptote are:
are:
f(x) = x^2 + 1/X
f(x) =4x^2 - 6/x + 1
f(x) =x^5/x^3 +1
f(x) =x² +2/ x^2+ 3x
How can the functions have an oblique asymptote be gotten?The concept that will be used here is finding the function one after the other.
The first function:
f(x) = x^2 + 1/X
The degree of numerator is seen to be 2, which can be considered to be is greater than the degree of denominator which is one, the, we can consider this function as oblique asymptote.
Second function:
f(x) =4x^2 - 6/x + 1
The degree of numerator which can be seen to be 2 is greater than the degree of denominator which is 1 and can be considered as an oblique asymptote.
Third function:
f(x) =-x/x^2
The degree of numerator can be seen as 1 which can be considered to be less than the degree of denominator which is 2, and we can not considere this as an oblique asymptote.
The fourth function:
f(x) =x^5/x^3 +1
The degree of numerator can be seen as 5 which can be considered to begreater than the degree of denominator which is 3 and this function can be considered to be an oblique asymptote.
Fifth option:
f(x) =x² +2/ x^2+ 3x
The degree of numerator can be seen as 3 which can be considerd to be greater than the highest degree of denominator which is seen as 2 and can be considered to be oblique asymptote.
Therefore, the 1st, 2nd, 4th, and 5th options are correct.
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missing options:
f(x) = x^2 + 1/X
f(x) =4x^2 - 6/x + 1
f(x) =-x/x^2
f(x) =x^5/x^3 +1
f(x) =x² +2/ x^2+ 3x
11. c = 13 squared, a = 6.6 squared, what is b squared
The value of b² is 125.44 units since b equals 11.2 units when c equals 13 units and an equals 6.6 units.
What is Pythagoras theorem?The Pythagorean theorem is a mathematical theorem that asserts that the square of the length of the hypotenuse (the side opposite the right angle) in a right-angled triangle is equal to the sum of the squares of the other two sides. It is mathematically stated as c2 = a2 + b2, where c is the length of the hypotenuse and a and b are the lengths of the other two sides.
Here,
c=13²
a=6.6²
a²+b²=c²
b=√(c²-a²)
=√(13²-6.6²)
b=11.2 units
b²=125.44 units
The value of b² is 125.44 units as b is equal to 11.2 units when c is 13 units and a is 6.6 units.
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One household is to be selected at random from a town.
The probability that the household has a cat is 20%
The probability that the household has a dog is 30%
The probability that the household has a cat or a dog is 45%
What is the probability that the household has a dog, given that the household has a cat?
The probability that the household has a dog given that the household has a cat is 37.5%
How to calculate?The probability that the household has a dog given that the household has a cat can be found using Bayes' Theorem.
Applying that, we have P(dog | cat) = P(cat and dog) / P(cat) = (P(cat) * P(dog | cat)) / P(cat) = (0.20 * P(dog | cat)) / 0.20 = P(dog | cat)
P(cat or dog) = P(cat) + P(dog) - P(cat and dog) = 0.45
P(cat and dog) = P(cat) * P(dog | cat) = 0.20 * P(dog | cat)
P(dog) = P(dog or cat) - P(cat) = 0.30
P(cat and dog) = P(dog or cat) - (P(dog) - P(cat and dog)) = 0.45 - (0.30 - P(cat and dog))
P(cat and dog) = 0.45 - 0.30 + P(cat and dog)
P(cat and dog) = 0.15 + P(cat and dog)
2 * P(cat and dog) = 0.15 + 2 * P(cat and dog)
P(cat and dog) = 0.15 / 2
P(dog | cat) = P(cat and dog) / P(cat) = 0.15 / (2 * 0.20) = 0.375
In conclusion, the probability that the household has a dog given that the household has a cat is 37.5%.
we treat the estimated intercept and slope coefficients from the sample regression as normally distributed because of:
We treat the estimated intercept and slope coefficients from the sample regression as normally distributed because of Central Limit Theorem .
The Central Limit Theorem is the reason is the estimated intercept and slope coefficients from a sample regression as normally distributed.
In the Regression Analysis, the intercept and slope coefficients are estimated using a sample of data, instead of the entire population.
The Central Limit Theorem states that ; as sample size increases, the distribution of the sample mean approaches a normal distribution.
In the context of regression analysis, it means that, as sample size increases, distribution of estimated coefficients approaches a normal distribution.
The given question is incomplete , the complete question is
We treat the estimated intercept and slope coefficients from the sample regression as normally distributed because of _____ .
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on a map, 2 cm represents 68 miles. how many miles away are two cities that are 7 cm apart on the map
Answer:
238 miles
Step-by-step explanation:
2cm=68 miles
2cm÷2=68 miles÷2
1cm = 34 miles
7cm x 34 miles
=238 miles
solve for x.........
The values of x in the circles and secant lines are 7 in all cases
How to determine the values of xTo calculate x, we make use of the intersecting secant line theorem which stated that
a * c = b * d
Using the above as a guide, we have the following:
Shape (7)
4 * (4 + 2x) =3 * (3x + 1)
This gives
16 + 8x = 9x + 9
Collect and evaluate the like terms
x = 7
Shape (8)
20 * (20 + x) = 15 * (15 + 3x)
This gives
400 + 20x = 225 + 45x
Collect and evaluate the like terms
x = 7
Shape (9)
6 * (6 + 4) = 5 * (5 + x)
This gives
60 = 25 + 5x
Collect and evaluate the like terms
x = 7
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What is m∠XYQ? Please help
∠ XYQ is 122 degrees.
What do you mean by Angles?Angles are an important concept in mathematics and geometry. They are formed when two rays or line segments intersect at a common endpoint, known as the vertex. Angles can be measured in degrees, which is a unit of angular measure. A full circle is 360 degrees, and angles can be classified based on their measure relative to this standard. For example, an angle measuring less than 90 degrees is called an acute angle, while an angle measuring exactly 90 degrees is a right angle. An angle measuring between 90 and 180 degrees is an obtuse angle, and an angle measuring exactly 180 degrees is a straight angle. Angles are used in many applications, such as trigonometry, physics, and engineering. They are also important in everyday life, such as determining the direction of travel or the position of objects.
We can start by using the fact that angles XYQ and ZYQ are co-interior angles (also known as consecutive interior angles) and that they lie on a straight line, which means they add up to 180 degrees. So we have:
∠XYQ + ∠ZYQ = 180
Substituting the given values for ∠ZYQ and ∠XYQ, we get:
(10a + 2) + (5a - 2) = 180
Simplifying and solving for a, we get:
15a = 180
a = 12
Now we can substitute this value back into the expression for angle ∠XYQ to find its value:
∠XYQ = 10a + 2 = 10(12) + 2 = 122
Therefore, angle ∠XYQ is 122 degrees.
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Help Please
I need to turn this in ASAP
(a) The two expressions 3(m - 2) + 2(m - 2) and 5(m - 2 ) are equivalent.
(b) They are equivalent because they will have equal values when we plug in the same variable.
What is an equivalent expression?
Equivalent expressions are expressions that work the same even though they look different.
If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value(s) for the variable(s).
The given expression include the following;
3(m - 2) + 2(m - 2)
= 3m - 6 + 2m - 4
= 5m - 10
5(m - 2 )
= 5m - 10
Thus, we can conclude that the two expressions 3(m - 2) + 2(m - 2) and 5(m - 2 ) are equivalent.
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Answer: only to give the other brainlest
Step-by-step explanation:
if you wanted to visualize the change in the mean test score for the same exam over multiple semesters which visualizations might be used (choose one or more)? group of answer choices pie chart bar chart histogram line chart
If you wanted to visualize the change in the mean test score for the same exam over multiple semesters then you can bar chart for visualizations.
A bar chart would be a suitable visualization to see the change in the mean test score for the same exam over multiple semesters. These types of charts allow you to see trends and changes over time, making it easy to compare the mean test scores from one semester to the next.
A histogram is used to visualize the distribution of continuous data, while a pie chart is used to show the proportion of various categories, so they are not suitable for this type of data visualization.
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pls pls help due in an hour pls
a) The solution for x is obtained as follows: x = 5.
b) The vertical angles are not complementary, as the sum of the measures of the angles is different of 90º.
What are vertical angles?Vertical angles are angles that are opposite by the same vertex on crossing segments, hence they share a common vertex, thus being congruent, meaning that they end up having the same angle measure.
Considering the vertical angles, the value of x is obtained as follows:
8x + 3 = 9x - 2.
9x - 8x = 3 + 2
x = 5.
Hence the angle measures are of:
8 x 5 + 3 = 43º.
The sum of the measures is of 86º, which is different of 90º, hence the vertical angles are not complementary.
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Given the function defined in the table below, find the average rate of change, in simplest form, of the function over the interval 3≤x≤5.
The average rate of change of function in the interval 3 ≤ x ≤ 5 is → Δr = (b - a)/2
What is a function? Define its domain and range?An function in mathematics defines a relationship between one variable (the independent variable {x}) and another variable (the dependent variable {y}). Example → y = f{x} = ax + b.Domain represents the set of values along the {x} - axis or the possible values of {x} for which f{x} exists.Range represents the set of values along the {y} - axis or the possible existing values of f{x} for a specific value of {x}.Given is a function f{x}.
Since the table is not given, let's assume that -
f{3} = a ... Eq { 1 }
f{5} = b ... Eq { 2 }
Then, we can write the average rate of change as -
Δr = (b - a)/(5 - 3)
Δr = (b - a)/2
Therefore, the average rate of change of function in the interval 3 ≤ x ≤ 5 is → Δr = (b - a)/2.
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Which of the following graph represents a functional relationship between a and y?
Answer:
A
Step-by-step explanation:
because of the vertical line rule
for every other one when you draw vertical line you can get more values for y for the same x
what is the probability that if 8 letters are typed, no letters are repeated? the probability that no letters are repeated is
The probability that no letters are repeated is 0.4121.
Divide the total number of outcomes by the entire number of different ways an event could happen to arrive at the probability. There are differences between probability and odds. The possibility of an event happening divided by the likelihood that it won't happen yields the odds. Probability is a metric used to assess the likelihood that a specific event will occur. The likelihood that the coin will land with the heads side up is measured using the probability concept when we toss it in the air. Here is an example of how probability is used in everyday life that you probably already know about. Prior to a major outing, we always consult the weather prediction.
So, the probability
Given, Number of letters=8
N[tex]=26*25*24*23*22*21*20*19[/tex]
P[tex]=\frac{25}{26}*\frac{24}{26}*\frac{23}{26}*\frac{22}{26}*\frac{21}{26}*\frac{20}{26}\\=0.96*0.92*0.88*0.85*0.81*0.77\\=0.4121[/tex]
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some continuous variables can be a bit more complex. take for example, the number of robberies in colorado springs per year. this is a ratio variable, but will not be expressed as a fraction except when being reported using measures of central tendency (e.g., mean, or median; we will discuss what these mean later). however, 4 robberies is twice as many as 2 robberies, and 0 robberies implies an absence of robberies. but is there such a thing as half of a robbery? you're either robbed or not.
The number of robberies in Colorado Springs per year is a ratio variable is 1/2
Ratio variables are a type of continuous variable in which the values have a meaningful order and can be compared in terms of their size.
In terms of mathematical expression, the number of robberies in Colorado Springs per year can be represented by the variable x.
The value of x can range from 0 to infinity, with 0 implying the absence of robberies and any value greater than 0 representing the number of robberies that have occurred. The mathematical expression for this ratio variable would be:
=> x = number of robberies in Colorado Springs per year.
Where the value of 4 and 2, then it can be written as,
=> 2/4 = 1/2
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if the population standard deviation of a sample decreases without other changes, what is most likely to happen to the confidence interval?
If the population standard deviation of a sample decreases without other changes, then the confidence interval will also decrease or become narrower.
If the population standard deviation of a sample decreases without other changes, the standard deviation of the sample mean (known as the standard error of the mean) will also decrease. This will lead to a decrease in the width of the confidence interval, meaning that the interval will become more precise and the confidence level in the estimation of the population mean will increase.
A smaller standard deviation results in a smaller standard error, which in turn leads to a narrower confidence interval and a higher level of confidence in the estimation of the population mean.
This is because the confidence interval is calculated using the standard error and the sample mean, and the standard error is a measure of the variability in the sample mean. So, if the standard deviation decreases, the variability in the sample mean will decrease, resulting in a more precise estimation of the population mean.
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A triangle has angle measures 23 degrees and 35 degrees what is the measure of the third triangle
Answer:
122
Step-by-step explanation:
will give briniest.
Create a two-way table from the diagram:
1
Match the values with their correct places in the table:
1
Question 1 options:
22
6
8
19
25
55
14
30
41
1.
a)
2.
b)
3.
c)
4.
d)
5.
e)
6.
f)
7.
g)
8.
h)
9.
i)
wo way frequency tables
Two-way frequency tables show how many data points fit in each category.
Here's an example:
Preference Male Female
Prefers dogs 363636 222222
Prefers cats 888 262626
No preference 222 666
The columns of the table tell us whether the student is a male or a female. The rows of the table tell us whether the student prefers dogs, cats, or doesn't have a preference.
Each cell tells us the number (or frequency) of students. For example, the 363636 is in the male column and the prefers dogs row. This tells us that there are 363636 males who preferred dogs in this dataset.
Notice that there are two variables—gender and preference—this is where the two in two-way frequency table comes from.
Want a review of making two-way frequency tables? Check out this video.
Want to practice making frequency tables? Check out this exercise.
Want to practice reading frequency tables? Check out this exercise
Two way relative frequency tables
Two-way relative frequency tables show what percent of data points fit in each category. We can use row relative frequencies or column relative frequencies, it just depends on the context of the problem.
For example, here's how we would make column relative frequencies:
Step 1: Find the totals for each column.
Preference Male Female
Prefers dogs 363636 222222
Prefers cats 888 262626
No preference 222 666
Total 464646 545454
Step 2: Divide each cell count by its column total and convert to a percentage.
Preference Male Female
Prefers dogs \dfrac{36}{46}\approx78\%
46
36
≈78%start fraction, 36, divided by, 46, end fraction, approximately equals, 78, percent \dfrac{22}{54}\approx41\%
54
22
≈41%start fraction, 22, divided by, 54, end fraction, approximately equals, 41, percent
Prefers cats \dfrac{8}{46}\approx17\%
46
8
≈17%start fraction, 8, divided by, 46, end fraction, approximately equals, 17, percent \dfrac{26}{54}\approx48\%
54
26
≈48%start fraction, 26, divided by, 54, end fraction, approximately equals, 48, percent
No preference \dfrac{2}{46}\approx4\%
46
2
≈4%start fraction, 2, divided by, 46, end fraction, approximately equals, 4, percent \dfrac{6}{54}\approx11\%
54
6
≈11%start fraction, 6, divided by, 54, end fraction, approximately equals, 11, percent
Total \dfrac{46}{46}=100\%
46
46
=100%start fraction, 46, divided by, 46, end fraction, equals, 100, percent \dfrac{54}{54}=100\%
54
54
=100%start fraction, 54, divided by, 54, end fraction, equals, 100, percent
Notice that sometimes your percentages won't add up to 100\%100%100, percent even though we rounded properly. This is called round-off error, and we don't worry about it too much.
Two-way relative frequency tables are useful when there are different sample sizes in a dataset. In this example, more females were surveyed than males, so using percentages makes it easier to compare the preferences of males and females. From the relative frequencies, we can see that a large majority of males preferred dogs (78\%)(78%)left parenthesis, 78, percent, right parenthesis compared to a minority of females (41\%)(41%)left parenthesis, 41, percent, right parenthesis.
please help !!!! hurry
The new triangle is similar with original triangle. By using this, the perimeter of the new triangle P₂ = 75 cm.
What is similar shape?When applying a scale factor, similar shapes are enlarged versions of one another. All of the corresponding angles and lengths in related shapes are equal and in the same ratio.
We divide the length of the enlarged shape by the length of the original shape to calculate the length scale factor.
The ratio of perimeter of both shapes is same as the ratio their corresponding side.
Given that the sides of triangle are 9cm, 20cm, 21cm.
The perimeter of this triangle
P₁ = 9cm + 20cm + 21cm
P₁ = 50cm
As the lengths of triangle are multiplied by 150%. So the perimeter of new triangle is also 150% of original triangle.
Let the perimeter of new triangle is P₂
So that
150% = P₂ / P₁
⇒ 150 / 100 = P₂ / 50
Multiply both sides by 50 we get
⇒ (3/2)*50 = P₂
⇒ P₂ = 150/2
⇒ P₂ = 75
So the perimeter of the new triangle P₂ = 75 cm.
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The level of significance in hypothesis testing is the probability of:A. Accepting a true null hypothesisB. Accepting a false null hypothesisC. Rejecting a true null hypothesisD. None of these alternatives is correct
there is a 5% probability of rejecting a false null hypothesis and hence c is correct option
Simply put, probability is the likelihood that something will occur.
When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.
Testing hypotheses is a crucial component of empirical research and evidence-based medicine. A well-developed hypothesis is only half the solution to the research problem. Working understanding of fundamental statistical principles is preferred for this, as well as subject-specific knowledge gleaned through a thorough survey of the literature.
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Triangular prism B is the image of triangular prism A after dilation by a scale factor of 1/5
. If the surface area of triangular prism B is 3 m^2 2, find the surface area of triangular prism A, the preimage.
The area of the prism A before dilation is 75 m²
What is dilation?Dilation means changing the size of an object without changing its shape. The size of the object may be increased or decreased based on the scale factor.
Given that, a triangular prism B is the image of triangular prism A after dilation by a scale factor of 1/5, the surface area of triangular prism B is 3 m²,
Since, the dilation transformation gives similar figures,
We know that, in solids that are similar, the ratio of their surface areas is equal to the square of the ratio of their scale factor.
Let the area of Prism A be x,
Therefore,
(1/5)² = 3/x
x = 75
Hence, the area of the prism A before dilation is 75 m²
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Members of the drama club plan to present its annual spring musical. They have $1,262.50 left from fundraising, but they estimate that the entire production will cost $1,600.00
GIVING BRAINLIEST! LOTSA MATH W POINTS Evaluate the expressions.
The results of the exponent expressions are;
5) 8
6) 125
7) 1
8) 1
9) 1/36
10) 1
11) 1/16
12) -27
13) 5 1/4
14) 1/243
15) 1/125
What are the laws of exponents?
We know that the laws of exponents are also called the laws of indices these are the laws that can be used when we are trying to sort out a mathematical problem that involves the expoennets.
In this case we can see that we can use the laws of the exponents to determine the simple values of each of the expressions as we have been able to show above and then know what then value of the exponent is.
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if a confidence interval is given from 8.56 to 10.19 and the mean is known to be 9.375, what is the maximum error?
The maximum error of the given confidence interval is 0.815, meaning that the true mean is likely to be within 0.815 of the known mean of 9.375.
Maximum Error = (Upper Limit - Lower Limit) / 2
In this case, we have a confidence interval from 8.56 to 10.19 and the mean is known to be 9.375. To calculate the maximum error, we first need to subtract the lower limit (8.56) from the upper limit (10.19), which gives us a difference of 1.63. We then divide this number by 2, which gives us a maximum error of 0.815. This means that the maximum error of the given confidence interval is 0.815. This means that the true mean is likely to be within 0.815 of the known mean of 9.375.
The maximum error of the given confidence interval is 0.815, meaning that the true mean is likely to be within 0.815 of the known mean of 9.375.
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are there any situations where the data may not be centered around the average or that the average isn't the best representation of the data collected?
Yes, there are situations where the data may not be centered around the average or where the average is not the best representation of the data collected.
For example, in a positively skewed distribution, the mean is greater than the median, and the data is spread out more on the right side of the average. In this case, the average may not accurately represent the "typical" value in the data set. In addition, in cases where there are extreme outliers in the data, the mean can be greatly affected, making it a less representative measure of central tendency. In such cases, the median or mode may be a better representation of the data.
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What is the displacement when A truck drives 8 km east, 5 km south, then 8 km west?
1 km
8 km
21 km
O5 km south
13 km south
West
North
South
East
Displacement of the truck is 5 km south.
What is Displacement?Displacement is defined as the change in the position of an object. Displacement is a vector quantity since it has both direction and magnitude.
Given that A truck drives 8 km east, 5 km south, then 8 km west.
The figure representing the position of the truck is given.
Truck moves from A to B 8 km east.
Then move from B to C 5 km south.
Then move from C to D 8 km west.
Displacement of the truck is the shortest distance from A to D.
It is equal to 5 km and the direction is south.
Hence the displacement is 5 km south.
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is an elevation of 3 m closer to sea level or farther from sea level than an elevation of -4 m?
an elevation of 3m is closer because it has a distance of 3 spaces from sea level, while -4 m has a distance of 4. Hope this helped =)
generally, which one of the following is the least appropriate measure of central tendency for a data set that contains outliers?
The median is the least appropriate measure of central tendency for a data set that contains outliers .
What does math's median mean?
When a data set's median value is used, 50% of the data points in the collection have values that are lower or equal to the median and 50% of them have values that are higher or equal to the median.
When working with a small data collection, you must first count the number of data points (n) and organize them in ascending order.
What is the average succinct response?
The middle number, or median, is obtained by sorting all of the data points and choosing the center one (or if there are two middle numbers, taking the mean of those two numbers).
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The complete question is -
Generally, which one of the following is the least appropriate measure of central tendency for a data set that contains outliers? a. mean b. median c. 2nd quartile d. 50th percentile