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      Question

      Average age of company A is 23 years and average age of

      both companies A and B is 15 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? TYPE 1
      A 10 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
      E 6 years Correct Answer Incorrect Answer

      Solution

      Average of Company B = (15 × 11 - 3 × 23)/8   => (165 - 69)/8 = 12 years

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