Question
The average rainfall recorded over the first three days
of a week was 85 cm, whereas the average for the last three days was 92 cm. If the weekly average rainfall was 88 cm, determine the rainfall on the third day.Solution
ATQ,
Total rainfall for the first three days = 85 × 3 = 255 cm
Total rainfall for the last three days = 92 × 3 = 276 cm
Total rainfall in the entire week = 88 × 7 = 616 cm
Rainfall on the third day = {(255 + 276) – 616} = 85 cm
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