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      Question

      Sum of ages of 70 members is 1400 years. The average

      age of 25 of them is 16 years and average age of another 25 of them is 12 years. Find the average age of the remaining members.
      A 33 years Correct Answer Incorrect Answer
      B 36 years Correct Answer Incorrect Answer
      C 37 years Correct Answer Incorrect Answer
      D 39 years Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Given, sum of age of 70 members = 1400 years
      Sum of age of 25 members = 25 ├Ч 16 = 400 years
      Sum of age of another 25 members = 25 ├Ч 12 = 300 years
      Remaining number of members = 70 тАУ 25 тАУ 25 = 20
      Average age of remaining 20 members = {(1400 тАУ 400 тАУ 300)/20} = (700/20) = 35 years

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