New SIDBI Grade A New Batch Starts on Nov 18

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    Question

    The present average age of X, Y, and Z is 45 years. 8 years ago, the average age of X and Y was 38 years. What is the present age of Z?

    A 38years Correct Answer Incorrect Answer
    B 43years Correct Answer Incorrect Answer
    C 40years Correct Answer Incorrect Answer
    D 35years Correct Answer Incorrect Answer

    Solution

    Let X, Y, and Z be P, Q, and R years old respectively. (presently) According to the question, (P + Q + R) ÷ 3 = 45   (P + Q + R) = 135      .... (1) {(P - 8) + (Q - 8)} ÷ 2 = 38   P + Q - 16 = 76   P + Q = 76 + 16   P + Q = 92      .... (2) Putting the value from (2) to (1), The present age of Z is 43 years.

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