New Register here for RBI, SEBI & NABARD strategy workshop! April 9 at 7 PM

    Question

    The average age of A and B is 19 years. If A is to be

    replaced by C, the average would be 18 years. The average age of C and A is 20 years. Find the age of A.
    A 21 yr Correct Answer Incorrect Answer
    B 23 yr Correct Answer Incorrect Answer
    C 16 yr Correct Answer Incorrect Answer
    D 25 yr Correct Answer Incorrect Answer

    Solution

    A + B = 2 × 19 = 38 yr B + C = 2 × 18 = 36 yr C + A = 2 × 20 = 40 yr On adding all three, 2 (A + B + C) = 38 + 36 + 40 = 114 ⇒  A + B + C = 57 ∴  A = (A + B + C) – (B + C) = 57 – 36 = 21 yr

    Practice Next