Statistics - Solve for Sum from Mean and Count (Level 3)

This math topic focuses on determining the sum of a set of numbers given their mean and the count of the numbers. The problems present scenarios where learners are provided with the mean of either 3, 4, or 5 numbers and are asked to calculate their total sum. It incorporates the application of the formula for mean, which is the sum of the numbers divided by the number of numbers, to solve for the sum. This topic helps in understanding and executing basic statistical calculations involving mean within the broader context of probability and statistics, emphasizing mean, median, and mode.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

Statistics - Solve for Sum from Mean and Count Worksheet

Math worksheet on 'Statistics - Solve for Sum from Mean and Count (Level 3)'. Part of a broader unit on 'Probability and Statistics - Mean, Median, and Mode - Practice' Learn online: app.mobius.academy/math/units/probability_and_statistics_mean_median_mode_practice/

1

If 4 numbers have a mean of 10, what is their sum?

Solve the challenge

a

39.5

b

36.5

c

45

d

40

e

44

f

41

2

If 3 numbers have a mean of 9, what is their sum?

Solve the challenge

a

29

b

30

c

24

d

26.5

e

27

f

30.5

3

If 3 numbers have a mean of 7, what is their sum?

Solve the challenge

a

19.5

b

21

c

22.5

d

24

e

20.5

f

15

4

If 5 numbers have a mean of 6, what is their sum?

Solve the challenge

a

35

b

33.5

c

34.5

d

30

e

24.5

f

26

5

If 5 numbers have a mean of 9, what is their sum?

Solve the challenge

a

41.5

b

48.5

c

42

d

43

e

45

f

47

6

If 5 numbers have a mean of 10, what is their sum?

Solve the challenge

a

55

b

53.5

c

52

d

50

e

54.5

f

44.5

7

If 4 numbers have a mean of 5, what is their sum?

Solve the challenge

a

23.5

b

20

c

17

d

22

e

15.5

f

16.5