Question
The first six days of a week had an average rainfall of 90
cm, while the last six days recorded an average of 98 cm. If the weekly average rainfall was 95 cm, find the rainfall on the sixth day.Solution
ATQ,
Total rainfall for the first six days = 90 × 6 = 540 cm
Total rainfall for the last six days = 98 × 6 = 588 cm
Total rainfall for the whole week = 95 × 7 = 665 cm
Rainfall on the sixth day = {(540 + 588) – 665} = 463 cm
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