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Algebra II : Mean

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Example Questions

Example Question #21 : Mean

Find the mean for the set:

10, 10, 11, 11, 11, 12, 12, 15, 27, 39

Possible Answers:

15.8

16.3

15.1

Correct answer:

15.8

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are ten numbers so we add them up and divide by ten:

$\frac{10+10+11+11+11+12+12+15+27+39}{10}=15.8$

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Example Question #22 : Mean

Find the mean of the set:

76, 78, 82, 83, 84, 84, 88, 89, 89, 89, 91, 91, 93, 97, 100, 100

Possible Answers:

88.4

87.9

89.2

88.7

Correct answer:

88.4

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 16 numbers in the set, so we add the numbers together and divide by 16 to find the mean:

76+78+82+83+84+84+88+89+89+89+91+91+93+97+100+100

$=1414\rightarrow \frac{1414}{16}=88.4$

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Example Question #23 : Mean

Find the mean of the set:

32, 33, 33, 34, 35, 37, 38, 41, 42, 45, 47

Possible Answers:

35.7

37.1

37.9

39.1

Correct answer:

37.9

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 11 numbers in the set, so we add the numbers together and divide by 11 to find the mean:

$\frac{32+33+33+34+35+37+38+41+42+45+47}{11}=37.9$

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Example Question #24 : Mean

Find the mean of the set:

7, 10, 16, 16, 16, 16, 17, 23, 25, 27, 30, 31, 41, 57, 57, 58

Possible Answers:

28.1

27.2

27.9

26.7

Correct answer:

27.9

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 16 numbers in the set, so we add the numbers together and divide by 16 to find the mean:

7+10+16+16+16+16+17+23+25+27+30+31+41+57+57+58

$=447\rightarrow \frac{447}{16}=27.9$

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Example Question #25 : Mean

Find the mean of the set:

11, 13, 17, 22, 22, 22, 23, 23, 26, 28, 47, 49

Possible Answers:

24.4

25.8

24.9

25.3

Correct answer:

25.3

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 12 numbers in the set, so we add the numbers together and divide by 12 to find the mean:

$\frac{11+13+17+22+22+22+23+23+26+28+47+49}{12}=25.3$

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Example Question #26 : Mean

Find the mean of the set:

4, 5, 6, 12, 15, 18, 19, 23, 26, 27, 31, 39, 41

Possible Answers:

21.5

20.5

Correct answer:

20.5

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 13 numbers in the set, so we add the numbers together and divide by 13 to find the mean:

4+5+6+12+15+18+19+23+26+27+31+39+41

$=266\rightarrow \frac{266}{13}=20.5$

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Example Question #27 : Mean

Find the mean of the set:

12, 15, 16, 24, 25, 31, 36

Possible Answers:

23.6

22.4

22.7

23.1

Correct answer:

22.7

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 7 numbers in the set, so we add the numbers together and divide by 7 to find the mean:

$\frac{12+15+16+24+25+31+36}{7}=\frac{159}{7}=22.7$

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Example Question #28 : Mean

Find the mean of the set:

15, 24, 27, 28, 28, 39, 44, 47, 61, 77, 88

Possible Answers:

44.5

43.5

42.5

Correct answer:

43.5

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 11 numbers in the set, so we add the numbers together and divide by 11 to find the mean:

$\frac{15+24+27+28+28+39+44+47+61+77+88}{11}=\frac{478}{11}=43.5$

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Example Question #29 : Mean

Find the mean of the set:

14, 22, 22, 31, 32, 35, 36, 37, 39, 41, 42, 48, 50, 58, 63

Possible Answers:

38.4

37.5

Correct answer:

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 15 numbers in the set, so we add the numbers together and divide by 15 to find the mean:

14+22+22+31+32+35+36+37+39+41+42+48+50+58+63

$=570\rightarrow \frac{570}{15}=38$

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Example Question #30 : Mean

Find the mean of the set:

2, 3, 5, 8, 13, 21, 34, 55

Possible Answers:

17.9

17.1

18.3

17.6

Correct answer:

17.6

Explanation:

To find the mean, there are two steps:

1. Add all of the numbers in the set together.

2. Divide that number by the amount of numbers are in the set.

For this problem there are 8 numbers in the set, so we add the numbers together and divide by 8 to find the mean:

$\frac{2+3+5+8+13+21+34+55}{8}=\frac{141}{8}=17.6$

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Algebra II : Mean

Study concepts, example questions & explanations for Algebra II

All Algebra II Resources

Example Questions

Example Question #21 : Mean

Example Question #22 : Mean

Example Question #23 : Mean

Example Question #24 : Mean

Example Question #25 : Mean

Example Question #26 : Mean

Example Question #27 : Mean

Example Question #28 : Mean

Example Question #29 : Mean

Example Question #30 : Mean

All Algebra II Resources

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