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    Question

    The average weight of A, B and C is 60 kg. If the

    average weight of A and B is 55 kg and the average weight of B and C is 58 kg, then what is the weight of B? 
    A 46 kg, Correct Answer Incorrect Answer
    B 48 kg Correct Answer Incorrect Answer
    C 52 kg Correct Answer Incorrect Answer
    D 54 kg Correct Answer Incorrect Answer

    Solution

    ATQ, Total of A, B, and C = A+B+C=60×3=180 Total of A and B = A+B=55×2=110 Total of B and C = B+C=58×2=116 Find C = C=180−110=70 Find A = A=180−116=64 Find B = B=110−64=46 Hence, B's weight is 46 kg.

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