Question

    The average weight of 40 students of a school is 52 kg.

    If the weight of the teacher is included, the average weight rises by 500 grams. Find the weight (in kg) of the teacher.
    A 72.5 Correct Answer Incorrect Answer
    B 74.5 Correct Answer Incorrect Answer
    C 73.5 Correct Answer Incorrect Answer
    D 71.5 Correct Answer Incorrect Answer

    Solution

    The average weight of 40 students =52kg. Total weight =2080kg. After the teacher includes total weight =41×52.5 =2152.5 Age of teacher =2152.5-2080 =72.5kg.

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