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    Question

    Average weight of all the people in a group is 65 kg.

    When two people of weight 72 kg and 84 kg left the group, average weight reduces by 1 kg. Find the number of people in the group now.
    A 24 Correct Answer Incorrect Answer
    B 26 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Let the number of people initially be 'n'.

    So, 65n - 64 × (n - 2) = 72 + 84

    Or, 65n - 64n + 128 = 156

    Or, n = 28

    Required number of people = 28 - 2 = 26

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