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    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.
    A 354 cm Correct Answer Incorrect Answer
    B 375 cm Correct Answer Incorrect Answer
    C 463 cm Correct Answer Incorrect Answer
    D 371 cm Correct Answer Incorrect Answer

    Solution

    ATQ,

    Total rainfall for the first six days = 90 ├Ч 6 = 540 cm

    Total rainfall for the last six days = 98 ├Ч 6 = 588 cm

    Total rainfall for the whole week = 95 ├Ч 7 = 665 cm

    Rainfall on the sixth day = {(540 + 588) тАУ 665} = 463 cm

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