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    Question

    The average weight of a group of five persons, A, B, C,

    D, and E is 66 kg. If another person K joins the group then the average weight of the group is decreased by 4 kg, then find the weight of K.
    A 40 kg Correct Answer Incorrect Answer
    B 41 kg Correct Answer Incorrect Answer
    C 42 kg Correct Answer Incorrect Answer
    D 43 kg Correct Answer Incorrect Answer

    Solution

    Total weight of A, B, C, D, and E together = 66 × 5 = 330 kg Weight of K = 62 × 6 – 330 = 372 – 330 = 42 kg

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