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    Question

    If the total ages of A and B is 7 years more than the

    total age of B and C. C is how many years younger than A?
    A 10 Correct Answer Incorrect Answer
    B 5 Correct Answer Incorrect Answer
    C 7 Correct Answer Incorrect Answer
    D Cannot be determined Correct Answer Incorrect Answer

    Solution

    Let the age of A, B and C be x, y and z respectively. Then, according to question, => (x + y) тАУ (y + z) = 7 =>┬аx + y тАУ y - z = 7 =>┬аx - z = 7 Thus, C is 7 years younger than A.

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