The mean

The Maths Habit

Four friends have 3, 5, 8 and 4 sweets.

How could they share them out fairly?

Put all 20 together and give everyone 5

Mean
The total of the values, shared out equally.

mean = total of the valueshow many values

Find the mean.

Find the mean.

Mean 7

Mean 8

Mean 7

Mean 11

Mean 7

Mean 10

Mean 7

Mean 5.5

Mean 7

Mean 20

Averages and range worksheet, page 1

Averages and range worksheet, page 2

Answer sheet

  1. The mean of four numbers is 9. Three of the numbers are 6, 10 and 13. What is the fourth number?

    7

  2. A climbing club has 5 members with a mean age of 14. A new member aged 20 joins. What is the mean age now?

    15

  3. Five plants grow 2.5 cm, 0 cm, 6 cm, 3.5 cm and 0 cm in a week. Find the mean growth.

    2.4 cm

  1. Find the mean: 12, 7, 9, 3, 9

    8

  2. Find the mean: 1.5, 6, 0, 4.5

    3

  3. The mean of five numbers is 6. Four of them are 3, 8, 5 and 9. Find the fifth number.

    5
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