Question

    The average weight of 8 persons increased by 1.5 kg when

    a person weighing 65 kg is replaced by a new person. What could be the weight of a new person?
    A 75 kg Correct Answer Incorrect Answer
    B 82 kg Correct Answer Incorrect Answer
    C 77 kg Correct Answer Incorrect Answer
    D 70 kg Correct Answer Incorrect Answer

    Solution

    Since the average increased by 1.5 kg, and there are 8 people,

    Total increase in weight=1.5 × 8 = 12 kg


    New person is 12 kg heavier than the person replaced:

    Weight of new person = 65 + 12 = 77 kg

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