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    Question

    Three years ago, the ratio of ages of C and D was 3:4.

    Seven years from now, the ratio of their ages will be 5:6. What is the current age of C?
    A 18 yrs Correct Answer Incorrect Answer
    B 22 yrs Correct Answer Incorrect Answer
    C 25 yrs Correct Answer Incorrect Answer
    D 10 yrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the age of C and D three years ago be 3x years and 4x years, respectively. So, present age of C = (3x + 3) years Present age of D = (4x + 3) years So, (3x + 3 + 7)/(4x + 3 + 7) = 5/6 6(3x + 10) = 5(4x + 10) 18x + 60 = 20x + 50 2x = 10 x = 5 So, the present age of C = 3x + 3 = 15 + 3 = 18 years

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