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    Question

    The average weight of 15 oarsmen in a boat is increased

    by 1.6 kg when one of the crew, who weighs 42 kg, is replaced by a new man. Find the weight of the new man.
    A 66 kg Correct Answer Incorrect Answer
    B 72 kg Correct Answer Incorrect Answer
    C 45 kg Correct Answer Incorrect Answer
    D 30 kg Correct Answer Incorrect Answer

    Solution

    Total increase in weight = Number of men ├Ч Average increase = 15 ├Ч 1.6 = 24 kg. Weight of new man = Weight of old man + Total increase = 42 + 24 = 66 kg.

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