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    Question

    The average weight of some children in a group is 45 kg.

    When 10 children of average weight 40 kg leave the group or 15 children of average weight 50 kg join the group, the average weight of children in both the cases is the same. The mumber of children, initially, in the group lies between
    A 45 and 55 Correct Answer Incorrect Answer
    B 35 and 45 Correct Answer Incorrect Answer
    C 55 and 65 Correct Answer Incorrect Answer
    D 65 and 75 Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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