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    Question

    Sum of ages of 55 team members is 1220 years. The

    average age of 20 of them is 19 years and the average age of another 15 of them is 20 years. Find the average age of the remaining members.
    A 29 years Correct Answer Incorrect Answer
    B 30 years Correct Answer Incorrect Answer
    C 27 years Correct Answer Incorrect Answer
    D 28 years Correct Answer Incorrect Answer

    Solution

    Given, sum of age of 55 team members = 1220 years
    Sum of age of 20 members = 20 ├Ч 19 = 380 years
    Sum of age of another 15 members = 15 ├Ч 20 = 300 years
    Remaining number of members = 55 тАУ 20 тАУ 15 = 20
    Average age of remaining 20 members = {(1220 тАУ 380 тАУ 300)/20} = (540/20) = 27 years

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