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    Question

    Average age of company A is 26 years and average age of

    both companies A and B is 12 years. If the ratio of number of employees in company A and B is 2:7, then what is the average age of company B?
    A 7 years Correct Answer Incorrect Answer
    B 11 years Correct Answer Incorrect Answer
    C 8 years Correct Answer Incorrect Answer
    D 12 years Correct Answer Incorrect Answer

    Solution

    Average of Company B = (12 × 9 - 2 × 26)/7   => (108 - 52)/7 = 8 years

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