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    Question

    The average weight of 14 students of a class is 20 kg.

    If a student leaves the class, the average weight of the class drops by 2 kg. Find the weight of the student (in kg) who left the class.
    A 43 Correct Answer Incorrect Answer
    B 45 Correct Answer Incorrect Answer
    C 46 Correct Answer Incorrect Answer
    D 49 Correct Answer Incorrect Answer

    Solution

    Average weight of 14 students =20kg. Total weight =20×14=280kg. After a student leaves a class then average =20-2 =18kg Total weight of 13 student =13×18=234 kg. Weight of a student who left the class =280-234=46 kg.

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