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    Question

    The average weight of 48 students in a school is 32 kg.

    If two new students with weights of 'x' kg and '(x + 6)' kg join the group, the average weight of the class increases to 32.4 kg. Determine the average weight of the two new students.
    A 37 kg Correct Answer Incorrect Answer
    B 39 kg Correct Answer Incorrect Answer
    C 40 kg Correct Answer Incorrect Answer
    D 43 kg Correct Answer Incorrect Answer
    E none Correct Answer Incorrect Answer

    Solution

    Total weight of 48 students = 48×32 = 1536 kg When two students join the class then new total weight = 50×32.4 = 1620 kg Increase in weight = 1620-1536 = 86 kg Average of 2 new students = 84/2 = 43 kg

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