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    Question

    8 years ago, the average age of a family of six persons

    was 50 years. In between these 8 years the family adopted a girl. Now at present the average age of the family is same as it was 8 years ago. Find the present age of the girl.
    A 5 years Correct Answer Incorrect Answer
    B 6 years Correct Answer Incorrect Answer
    C 2 years Correct Answer Incorrect Answer
    D 8 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Sum of the present age of the family excluding girl = 6 x (50 + 8) = 348 years Sum of the present age of the family including girl = 7 x 50 = 350 years Present age of the girl = 350 – 348 = 2 years

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