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      Question

      The average age of a group of 10 students is 30 years.

      Two persons of age 40 years and 35 years, left the group and 2 persons of age 50 years and 95 years, joined the group. Find the new average age of the group.
      A 37 years Correct Answer Incorrect Answer
      B 31 years Correct Answer Incorrect Answer
      C 38 years Correct Answer Incorrect Answer
      D 40 years Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Required average = {(10 × 30) – 40 – 35 + 50 + 95}/10 = 37 years

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