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    Question

    The average weight of a group of

    20 boys is 52 kg. If the total weight of a group of 14 girls is 30% less than the total weight of the group of boys, what is the ratio between the average weight of a boy and that of a girl, respectively?
    A 3:2 Correct Answer Incorrect Answer
    B 1:2 Correct Answer Incorrect Answer
    C 1:1 Correct Answer Incorrect Answer
    D 3:5 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Total weight of all boys = 20 × 52 = 1040 kg Total weight of all girls = 1040 × 0.70 = 728 kg Average weight of a girl = 728 ÷ 14 = 52 kg Required ratio = 52:52 = 1:1

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