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Algebra 1 : How to find mean

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Example Questions

Example Question #16 : Basic Statistics

Find the mean for the following set of numbers:

, , , and

Possible Answers:

-12.5

-35.5

-37.1

2.5

Correct answer:

-35.5

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{(-98)+(-52)+(-15)+23}{4}$

$\text{Mean}=\frac{(-165)+23}{4}$

$\text{Mean}=\frac{(-142)}{4}$

$\text{Mean}=-35.5$

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Example Question #21 : Mean

Find the mean for the following set of numbers:

, , , and 12x

Possible Answers:

9.25x

7.25x

8.5x

6.5x

Correct answer:

7.25x

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{4x+5x+8x+12x}{4}$

$\text{Mean}=\frac{29x}{4}$

$\text{Mean}=7.25x$

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Example Question #71 : How To Find Mean

Find the mean for the following set of numbers:

, 10y , , and -2y

Possible Answers:

5.5y

5.25y

4.25y

Correct answer:

5.25y

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{5y+10y+8y+(-2y)}{4}$

$\text{Mean}=\frac{23y+(-2y)}{4}$

$\text{Mean}=\frac{21y}{4}$

$\text{Mean}=5.25y$

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Example Question #72 : How To Find Mean

Find the mean for the following set of numbers:

16a , 58a , -80a , , and

Possible Answers:

2.8a

-0.8a

1.6a

1.2a

Correct answer:

1.2a

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{16a+58a+(-80a)+3a+9a}{5}$

$\text{Mean}=\frac{86a+(-80a)}{5}$

$\text{Mean}=\frac{6a}{5}$

$\text{Mean}=1.2a$

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Example Question #73 : How To Find Mean

Find the mean for the following set of numbers:

, , , , , and

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{5+48+(-9)+(-8)+(-8)+14}{6}$

$\text{Mean}=\frac{67+(-25)}{6}$

$\text{Mean}=\frac{42}{6}$

$\text{Mean}=7$

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Example Question #74 : How To Find Mean

Find the mean for the following set of numbers:

-3c , , , , , and

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{(-3c)+5c+6c+6c+8c+8c}{6}$

$\text{Mean}=\frac{33c+(-3c)}{6}$

$\text{Mean}=\frac{30c}{6}$

$\text{Mean}=5c$

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Example Question #75 : How To Find Mean

Find the mean for the following set of numbers:

-45n , , , 15n , 15n , , and

Possible Answers:

12n

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{(-45n)+6n+8n+15n+15n+6n+2n}{7}$

$\text{Mean}=\frac{52n+(-45n)}{7}$

$\text{Mean}=\frac{7n}{7}$

$\text{Mean}=n$

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Example Question #76 : How To Find Mean

Find the mean for the following set of numbers:

, , , and

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{(-10)+50+6+78}{4}$

$\text{Mean}=\frac{134+(-10)}{4}$

$\text{Mean}=\frac{124}{4}$

$\text{Mean}=31$

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Example Question #77 : How To Find Mean

Find the mean for the following set of numbers:

, , and

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

$\text{Mean}=\frac{\text{Sum of all values}}{\text{Number of values}}$

$\text{Mean}=\frac{(-100)+45+55}{3}$

$\text{Mean}=\frac{0}{3}$

$\text{Mean}=0$

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Example Question #72 : How To Find Mean

Consider the following set of numbers:

25, 27, 36, 32, 41, 22, 28, 33, 44, 51, 37, 32

Find the mean of the set.

Possible Answers:

34.2

34.7

33.8

Correct answer:

Explanation:

To find the mean of a set of numbers, we add all of the numbers together and then divide by the number of numbers in the set:

25+27+36+32+41+22+28+33+44+51+37+32=408

$\frac{408}{12}=34$

From this we find that the mean of the set is 34.

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Algebra 1 : How to find mean

Study concepts, example questions & explanations for Algebra 1

All Algebra 1 Resources

Example Questions

Example Question #16 : Basic Statistics

Example Question #21 : Mean

Example Question #71 : How To Find Mean

Example Question #72 : How To Find Mean

Example Question #73 : How To Find Mean

Example Question #74 : How To Find Mean

Example Question #75 : How To Find Mean

Example Question #76 : How To Find Mean

Example Question #77 : How To Find Mean

Example Question #72 : How To Find Mean

All Algebra 1 Resources

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