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    Question

    Average age of company A is 28 years and average age of

    both companies A and B is 20 years. If the ratio of number of employees in company A and B is 3:8, then what is the average age of company B?
    A 17 years Correct Answer Incorrect Answer
    B 21 years Correct Answer Incorrect Answer
    C 18 years Correct Answer Incorrect Answer
    D 22 years Correct Answer Incorrect Answer
    E 20 years Correct Answer Incorrect Answer

    Solution

    Average of Company B = (20 × 11 - 3 × 28)/8 => (220 - 84)/8 = 17 years

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