Question

The average (or mean) rainfall of a place from Monday to Wednesday of a particular week
was 10.2 mm and that from Wednesday to Sunday was 18.2 mm. If the rainfall on
Wednesday was 22.4 mm, find the average rainfall of the place for the whole week.
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Answer 1

Answer:

from Monday to wednesday

10.2 × 3 = 30.6

and from Wednesday to Sunday was

18.2 × 5 = 91

there the some between that is

( 30.6+91 ) = 121.6

but Wednesday repeated here ,

We need to remove the value of single Wednesday

therefore, ( 121.6-22.4 ) = 99.2

therefore the average rainfall was,

99.2/7 = 11.17