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    Question

    The average weight of a group of five persons, A, B, C, D, and E is 100 kg. If another person K joins the group then the average weight of the group is decreased by 2.3 kg, then find the weight of K.

    A 81.2 kg Correct Answer Incorrect Answer
    B 83.2 kg Correct Answer Incorrect Answer
    C 85.2 kg Correct Answer Incorrect Answer
    D 86.2 kg Correct Answer Incorrect Answer

    Solution

    Total weight of A, B, C, D, and E together = 100 × 5 = 500 kg Weight of K = 97.7 × 6 – 500 = 586.2 – 500 = 86.2 kg

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