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    Question

    Present average age of A, B, and C is 30 years. If 5

    years ago, the average age of A and C was 25 years, then find the present age of B.
    A 40 yrs Correct Answer Incorrect Answer
    B 15 yrs Correct Answer Incorrect Answer
    C 30 yrs Correct Answer Incorrect Answer
    D 25 yrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Sum of present ages of A, B, and C = 30 x 3 = 90 years 5 years ago, sum of ages of A and C = 25 x 2 = 50 years So, sum of the present ages of A and C = 50 + 10 = 60 years Therefore, present age of B = 90 - 60 = 30 years

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