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    Question

    In a batch of 36 students, the average age is 25 years.

    Later, 6 new students join the batch and the average age of the entire class drops by 1.5 years. What is the average age of the new students?
    A 13 years Correct Answer Incorrect Answer
    B 14 years Correct Answer Incorrect Answer
    C 14.5 years Correct Answer Incorrect Answer
    D 15 years Correct Answer Incorrect Answer

    Solution

    Initial sum = 36 × 25 = 900 years
    New average = 23.5
    New total = 42
    New sum = 42 × 23.5 = 987 years
    New students' sum = 987 - 900 = 87 years
    Average = 87 ÷ 6 = 14.5 years

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