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    Question

    A village experienced an average rainfall of 150 cm in the

    first five days of a week, and the last five days recorded an average of 155 cm. If the average rainfall for the whole week was 153 cm, calculate the rainfall on the fifth day.
    A 454 cm Correct Answer Incorrect Answer
    B 585 cm Correct Answer Incorrect Answer
    C 329 cm Correct Answer Incorrect Answer
    D 415 cm Correct Answer Incorrect Answer

    Solution

    ATQ,

    Total rainfall for the first five days = 150 × 5 = 750 cm

    Total rainfall for the last five days = 155 × 5 = 775 cm

    Total rainfall for the entire week = 153 × 7 = 1071 cm

    Rainfall on the fifth day = {(750 + 775) – 1071} = 454 cm

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