Find the probability of taking out the king from a well shuffled pack of 52 cards

In selecting 10 students out of the class of 40 students, if 40 names are placed in a hat and 10 names are drawn out of the hat, the type of sample is:

a random sampling.

Random sampling is a type of sampling method where each member of the population has an equal chance of being selected.

In this case, the population is the class of 40 students and the sample size is 10. By randomly selecting 10 names out of a hat, each student has an equal chance of being chosen for the sample.

This ensures that the sample is representative of the entire population, without any bias.

Random sampling is a widely used method for selecting a representative sample from a larger population.

It is important to use random sampling when conducting research or surveys in order to ensure that the results are reliable and accurate.

Random sampling helps to eliminate any potential bias that might be present in the sample if it was chosen through some other method. This is why it is important to use random sampling when selecting a sample from a larger population.

Complete Question:

"To select 10 students out of the class of 40 students, 40 names are placed in a hat and 10 names are drawn out of the hat. what type of sample is this?"

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Answer:

-0.04ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ

Answer:

1/-25

Step-by-step explanation:

First we plug it in

-(-5)^-2

Then since the exponent is negative, we take the equation and put it under one which makes it a positive.

1/-(-5)^2

Then we solve the exponent

1/-(25)

Since it's a negative outside the parenthesis we treat it as multiplying it by -1 in which case we'd get

1/-25

The percentage of students age 15 and above travel to school by bus is given as follows:

25.64%.

The percentage is obtained applying the proportions in the context of this problem.

A proportion is applied because a percentage is calculated with the division of the number of desired outcomes by the number of total outcomes, a result which is then multiplied by 100%.

The total outcomes are given as follows:

195 students 15 and above that travel by bus.

The desired outcomes are given as follows:

195 - 65 - (98 - 18) = 50 students 15 and above that travel by bus.

Hence the percentage is given as follows:

50/195 x 100% = 25.64%.

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Answer:

35 - 8k

Step-by-step explanation:

(24 - 3k) - (5k - 11)

= 24 - 3k - 5k + 11

= 35 - 8k

Answer:

[tex]\dfrac{c}{2}[/tex]

Step-by-step explanation:

We can simplify the given expression by canceling like terms.

Remember that anything divided by itself is 1.

ex:

[tex]\dfrac{2x}{x} = 2 \cdot \dfrac{x}{x} = 2 \cdot 1 = 2[/tex]

Applying this logic to the given expression:

[tex]\dfrac{a}{2b} \cdot \dfrac{bc}{a}[/tex]

↓ simplify multiplication of fractions

[tex]\dfrac{a \cdot bc}{2b \cdot a}[/tex]

↓ rewrite to align like variables

[tex]\dfrac{a \cdot b \cdot c}{a \cdot b \cdot 2}[/tex]

↓ separate out variables that are divided by each other

[tex]\dfrac{a}{a} \cdot \dfrac{b}{b} \cdot \dfrac{c}{2}[/tex]

↓ represent them as 1

[tex]1 \cdot 1 \cdot \dfrac{c}{2}[/tex]

↓ rewrite without unnecessary 1's

[tex]\dfrac{c}{2}[/tex]

The percentage of total budget for insurance, housing and entertainment is 3%. 13.3% and 4% respectively.

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to calculate a percentage of a number, we should divide it by its entirety and then multiply it by 100. The proportion therefore refers to a component per hundred. Per 100 is what the word percent means. The letter "%" stands for it.

The total budget given is $4100 for the month.

The percentage of total budget for insurance is:

123/ 4100 (100) = 3%

The percentage of total budget for housing is:

574/ 4100 (100) = 13.3%

The percentage of total budget for entertainment is:

164/4100 (100) = 4%

Hence, the percentage of total budget for insurance, housing and entertainment is 3%. 13.3% and 4% respectively.

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The expression that is incorrectly simplified is given as follows:

[tex]\sqrt[4]{9x^4} \times \sqrt[4]{16x^4} = 12x^4[/tex]

The expressions in this problem involve roots, which also can be written as exponents, hence exponential rules such as multiplication of terms with same base and different exponents, along with the power of power rule, are used.

For the first expression, we have that the fourth root can be expressed as an exponent of 1/4, hence:

The coefficients however, stay inside the root, meaning that the result of 12 is false, and the statement is incorrect.

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Answer:

Only can do the first one

Let's call the measures of the angles in the triangle x, 3x, and 4x.

According to the ratio, we have:

x : 3x : 4x = 8 : 3 : 4

To find the value of x, we can set up a proportion:

8/x = 3/(3x) = 4/(4x)

Cross multiplying, we get:

8x = 12

So, x = 12/8 = 3

Therefore, the measures of the angles in the triangle are 3x, 3(3x), and 4(3x).

The measure of the largest angle is 4x = 4(3) = 12.

The slope-intercept form of the equations are y = -2x/3 + 3 and y = 3x/2 + 4 and the line are perpendicular to each other.

The meaning of slope intercept form is the equation of a straight line in the form y = mx + b where m is the slope of the line and b is its y-intercept.

Given that two equations, we need to find their slope intercept form, and determine if the lines are parallel, perpendicular, or neither (intersecting).

The given equations are;

A) 2x + 3y = 9

B) 2y - 3x = 8

The general equation of a line, in a slope intercept form, is given by,

y = mx + c, where m is the slope of the line and c is the y-intercept,

A) 2x + 3y = 9

3y = 9-2x

y = -2x/3 + 3....(i)

B) 2y - 3x = 8

2y = 3x+8

y = 3x/2 + 4.....(ii)

Here, the slope are -2/3 and 3/2, we can say that both the slopes are negative reciprocal of each other,

We know that slopes of two perpendicular lines are negative reciprocal of each other,

Therefore, the given two line are perpendicular to each other.

Hence, the slope-intercept form of the equations are y = -2x/3 + 3 and y = 3x/2 + 4 and the line are perpendicular to each other.

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From the data analytics of this table, the right statements are A,C and D.

In mathematics, data is a collection of facts and figures that can take any shape, whether it be numerical or not. You can calculate numerical data, which is always gathered in number form and includes things like student test results, employee salaries, football team member heights, etc.

Given in the table of students which are watching movies or not

         Yes       No      Total

Boys    6          8          14

Girls     9          7          16

Total    15        15         30

Statement (A): 27% of sampled students are boys who did not watch a movie?

27% of total students = 27 * 30/100

= 810/100

≈ 8 boys

So the statement (A) is true.

Statement (B): 30% of sampled girls watched a movie?

30% of sampled girl = 30 * 16/100

= 480/100

≈ 5 girls

So the statement (B) is false.

Statement (C): 50% of sampled students did not watch a movie?

50% of total students = 50 * 30/100

= 1500/100

= 15 students

So the statement (C) is true.

Statement (D): 57% of sampled boys did not watch a movie?

57% of total students = 57 * 14/100

= 798/100

≈ 8 boys

So the statement (D) is true.

SO that, the right statements are A,C and D.

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The length of PR in the triangle is 229 feet.

To indirectly measure the distance across a river, Savannah stands on one side of the river and uses sight lines to a landmark on the opposite bank. Savannah draws  the diagram below to show the lengths and angles that she measured. Let's find PR, the distance across the river.

Triangle PRE is similar to triangle POC. Therefore, similar triangles are the triangles that have corresponding sides in ratio to each other and corresponding angles congruent to each other.

Hence,

PR = x

165 / 255 = x / x + 125

cross multiply

165(x + 125) = 255x

165x + 20625 = 255x

165x - 255x = - 20625

-90x = - 20625

divide both sides of the equation by -90

x = - 20625 / - 90

x = 229.166666667

Therefore,

PR = 229 ft

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the Estimated number of rabbits will be 80 in the year 2016.

A relationship between a group of inputs and one output is referred to as a function. In plain English, a function is an association between inputs in which each input is connected to precisely one output. A domain, codomain, or range exists for every function. Typically, f(x), where x is the input, is used to represent a function.

Given a table of Rabit at a zoo in the table below,

2008 14

2009 24

2010 30

2011         39

2012 45

2013 57

M: 2010.5 M: 34.8333

To estimate the number of rabbits in the zoo in 2016 we need to find the linear equation;

Sum of X = 12063

Sum of Y = 209

Mean X = 2010.5

Mean Y = 34.8333

Sum of squares (SSX) = 17.5

Sum of products (SP) = 143.5

Regression Equation = ŷ = bX + a

b = SP/SSX = 143.5/17.5 = 8.2

a = MY - bMX = 34.83 - (8.2*2010.5) = -16451.26667

ŷ = 8.2X - 16451.26667

For x = 2016

y =  8.2* 2016 - 16451.26667

y = 79.933 or 80

therefore, the Estimated number of rabbits will be 80 in the year 2016.

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Complete question:

A possible reason for the strong positive correlation is high levels of rainfall. (fourth option)

Correlation is a measure used in statistics to measure the linear relationship that two variables have.

When two variables have a positive correlation, it means that the two variables move in the same direction. In this question, the number of umbrellas sold increase when water levels in streams increase. An reason for this could be that the increased water levels lead to higher rate of rainfall which would lead to people buying more umbrellas.

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Answer:

the coefficient of 0 indicates that there is no relationship between the two values

Therefore, a maximum area the farmer can enclose with the 144 feet of fencing will be1250 square feet.

Let the length of the field =  feet

 And the width of the field =  feet

Therefore, area of the rectangular field = Length × Width

                                                             A =  x*y  square feet

Since, length of the fence = 100 feet

And the farmer has to enclose three sides of the rectangle as shown in the figure attached.

Therefore, length of the fence = length + 2(width)

                                               = (x+2y) feet

Hence,  (x+2y)=100

x=100-2y

By substituting the value of 'x' in the expression for the area of the rectangular field.

A=(100-2y)y

A=-2y^2+144y

Find the derivative of the expression with respect to y ,

A'= -4y+100

A'=0

4y=100

y=25

A=-2*625+2500

A=2500-1250

A=1250 square feet

Therefore, maximum area the farmer can enclose with the 144 feet of fencing will be1250 square feet.

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Answer:

see below

Step-by-step explanation:

shift B right by 4units & up by 2 units to have point B overlap point A so the 2 circles center will be overlapped

The initial value of the first investment was M = Rs.12,000,000 and the initial value of the second investment was N = Rs.16,000,000.

Let's assume the initial investment in the first investment be M and the initial investment in the second investment be N.

We know that the annual return from the first investment is 3% of M and the annual return from the second investment is 5% of N.

So, the total annual return (T) is:

T = 0.03M + 0.05N = 1160000

The investor increases his investment in the first investment by 25%, so the new investment in the first investment becomes:

M1 = M + 0.25M = 1.25M

And the new annual return from the first investment becomes:

R1 = 0.03 * 1.25M = 0.0375M

Similarly, the new investment in the second investment becomes:

N1 = N + 0.40N = 1.40N

And the new annual return from the second investment becomes:

R2 = 0.05 * 1.40N = 0.07N

So, the new total annual return (T1) is:

T1 = R1 + R2 = 0.0375M + 0.07N

And the increase in the total annual return is:

410,000 = T1 - T

We have 2 equations with 2 variables (M and N), so we can solve for them.

0.0375M + 0.07N = 0.03M + 0.05N + 410000

Expanding and solving the equation we get:

M = 12,000,000

N = 16,000,000

So, the initial value of the first investment was M = Rs.12,000,000 and the initial value of the second investment was N = Rs.16,000,000.

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To find the time it took Clare to ride 10 miles, we can use the concept of speed, which is defined as distance divided by time. In this case, Clare's constant speed was 15 miles in 72 minutes, so her speed is 15/72 miles per minute.

Using this speed, we can calculate the time it took her to ride 10 miles by dividing the distance by the speed:

Time = Distance / Speed

Time = 10 miles / (15/72 miles per minute)

Time = 10 * 72 / 15 minutes

Time = 43.2 minutes

So, it took Clare approximately 43.2 minutes to ride 10 miles at her constant speed of 15 miles in 72 minutes.

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The equation d = (100/3)h models the amount in dollars, d, Troy charges when it take him, h, hours to mow a lawn.

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

For example, 3x – 5 = 16 is an equation.

Given,

Troy charges $50 to mow the lawn that  took him 1.5 hours to mow

Charges are proportional to time.

If charges are d and time is h

then,

Ratio of Charges to time

⇒ d/h = 50/1.5      

⇒ d/h = 100/3

⇒ d = (100/3)h

Hence, d = (100/3)h is the equation that can be used to calculate the amount with time.

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11/6 is the solution of the equation 4x−1/3 = 7/1.

Two or more expressions with an Equal sign is called as Equation.

The given equation is 4x−1/3 = 7/1

We have to isolate the variable term x by adding 1/3 on both sides

4x=7+1/3

4x=22/3

Divide both sides by 4

x=22/12

22 and 12 are the multiples of 2.

x=11/6

Hence, 11/6 is the solution of the equation 4x−1/3 = 7/1.

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The number of miles in 4 weeks is 20 mules

From the question, we have the following parameters that can be used in our computation:

Stone runs 1 mile five times a week

This means that the rate is

Rate = 1 mile * 5 per week

So, we have

Rate = 5 miles per week

For 4 weeks, we have

Distance = 5 * 4

Evaluate

Distance = 20 miles

Hence, the distance is 20 miles

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The rate of the machine increased by 0.26% every year.

We know simple interest (SI) is given by SI = (p×r×t)/100, where

p = principle, r = rate in percentage, and t = time in years.

Given, On 2078/08/20 A machine was valued at Rs. 20000 whereas its original value was Rs. 17,500​.

Now, From 2023 to 2078 it is (78 - 23) = 55 years.

Therefore,

(20000 - 17500) = (17500×r×55)/100.

2500 = 175×r×55.

2500 = 9625r.

r = 2500/9625.

r = 0.26%.

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Seth must attend the move 17 times

The difference in price of matinee is

= price of matinee normally - price of matinee with movie pass

=  3.50 - 1

= 2.5

We divide to find the number of times

= 40 / 2.5

= 16

In other that Seth's father benefits Seth must attend at least 17 times

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In rectangle , The width is 8 and the length is 37.

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.

90 = 2(x + 5 + 4x)

90 = 2(5x + 5)

90 = 10x + 10

80 = 10x

x = 8

So the width is 8 and the length is 37.

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The complete question is -

The length of a rectangle is five inches more than four times it’s width. If the perimeter is 90 inches, find its dimensions

There are a total of 5 distinct rectangles that can be formed whose area is equal to 5 times the numerical value of the perimeter.

The area of a rectangle is given by:

A = L*W, where L- length of rectangle and W- width of rectangle,

The perimeter of a rectangle is given by:

P = 2*(L + W)

Since area of rectangle in square units is equal to 5 times the numerical value of the perimeter of the rectangle, on substituting the perimeter in terms of the area, we get:

P = 2(L + W) = 2( √(A/5) * √(5A))

Since the length of the sides must be integers, the possible values of area can be 5, 25, 125, and so on.

For each value of A, there can only be one possible rectangle that is formed. Therefore, only 5 distinct rectangles with integer side lengths that can be formed which meets the provided criteria.

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The spherical coordinate system is the most suitable system of coordinates to describe the spherical shell between two concentric spheres centered at (4,1,2).

A system of coordinates is a set of numbers used to describe the position of a point in space. There are different types of coordinate systems, each with its own advantages and disadvantages.

The spherical shell is the region of space between two spheres with the same center, but different radii. In this case, the center of both spheres is at (4,1,2) and the inner sphere has a radius of 7 while the outer sphere has a radius of 13.

One of the most commonly used coordinate systems for describing spheres is the spherical coordinate system.

To use this system of coordinates to describe the spherical shell, we first need to determine the radial distance for each point in the shell. This distance is between 7 and 13, since the shell lies between the inner and outer spheres.

Therefore, to describe a point in the spherical shell using spherical coordinates, we use the radial distance, polar angle, and azimuthal angle. These coordinates can then be used to plot the spherical shell and understand its geometry and properties.

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The converse of "If it rains, then they cancel school" is "If they cancel school, then it rains."

Converse is a statement obtained by reversing the implication (conditional statement). Simply put, conversion is the opposite of implication. For example, an implication has the formula p→q, then the conversion is the opposite, namely q→p. To understand it better, here is an example conversion.

1 Implication: If Sam is thirsty, then Sam drinks. Conversation: If Sam drinks, then Sam is thirsty.

Implication: If the road is wet, then it rained last night. Conversation: If it rained last night, then the streets are wet.

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Answer:

Step-by-step explanation:

5=19600

10=17200

15=14800

20=12400

it should take about 46 mins to land and the final question should be B

Answer:

x = 50

Step-by-step explanation:

50 + 2x = 150

2x = 100

x = 50

Each guest being assigned to bring an item to the party is an example of a function because a unique output (the item to bring) is assigned to each input (the guest).

In this case, each guest is the input, and the item they are assigned to bring is the output. Each guest is assigned exactly one item, and there are no two guests assigned to bring the same item. This means that for each guest, there is a unique item that they are assigned to bring, and no two guests are assigned to bring the same item.

Therefore, the assignment of guests to items to bring to the dinner party is an example of a function because it assigns a unique output (the item) to each input (the guest), and it meets the mathematical definition of a function.

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