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    Question

    The age of A is 40% less than that of B. The age of B is

    15 years more than the average age of his two friends whose total age is 20 years. Find the difference of age of A and B?
    A 16 years Correct Answer Incorrect Answer
    B 10 years Correct Answer Incorrect Answer
    C 12 years Correct Answer Incorrect Answer
    D 18 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    B is 15 years more than the average age of his two friends whose total age is 20 years. Present age of B = 15 + (20/2) = 25 years Present age of A = (60/100) × 25 = 15 years Required difference = 25 – 15 = 10 years

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