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    Question

    The average age of a group of 20 students is 30 years.

    Two persons of age 40 years and 35 years, left the group and 2 persons of age 50 years and 65 years, joined the group. Find the new average age of the group.
    A 37 years Correct Answer Incorrect Answer
    B 29 years Correct Answer Incorrect Answer
    C 32 years Correct Answer Incorrect Answer
    D 21 years Correct Answer Incorrect Answer

    Solution

    Required average = {(20 × 30) – 40 – 35 + 50 + 65}/20 = 32 years

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