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    Question

    The average age of a group of 12 students is 32

    years. Two persons of age 40 years and 31 years, left the group and 2 persons of age 54 years and 101 years, joined the group. Find the new average age of the group.
    A 23 years Correct Answer Incorrect Answer
    B 39 years Correct Answer Incorrect Answer
    C 27 years Correct Answer Incorrect Answer
    D 29 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Required average = {(12 × 32) – 40 – 31 + 54 + 101}/12 = 39 years

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