Question

3

a) The average rainfall of the last week was 35 mm. If the records of daily
rainfall from Sunday to Friday were 45 mm, 22 mm, 28 mm, 36 mm, 30 mm
and 24 mm, find the rainfall on Saturday.

Answer 1

The rainfall on Saturday was of 60 mm.

Explanation:

Average rainfall:

The average rainfall is given by the total rainfall divided by the number of days(7). So

If the records of daily rainfall from Sunday to Friday were 45 mm, 22 mm, 28 mm, 36 mm, 30 mm and 24 mm

On Saturday it was of x mm. So

`35 = (45 + 22 + 28 + 36 + 30 + 24 + x)/(7)`

`185 + x = 245`

`x = 245 - 185`

`x = 60`

The rainfall on Saturday was of 60 mm.