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    Question

    Average weight of all the people in a group is 61 kg.

    When two people of weight 66 kg and 84 kg left the group, average weight reduces by 1 kg. Find the number of people in the group now.
    A 26 Correct Answer Incorrect Answer
    B 28 Correct Answer Incorrect Answer
    C 30 Correct Answer Incorrect Answer
    D 32 Correct Answer Incorrect Answer

    Solution

    Let the number of people initially be 'n'.

    So, 61n - 60 × (n - 2) = 66 + 84

    Or, 61n - 60n + 120 = 150

    Or, n = 30

    Required number of people = 30 - 2 = 28

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