Average age of 9 members of a club is 29 years. If 2 more persons with the average age of 40 years have become the members of the club, find average age of all the 11 members.\nOptions:\n(A) 15\n(B) 31\n(C) 77\n(D) 99\n(E) 22 Stream of consciousness first, then make a decision:
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Average age of 9 members = 29 years; Excess age of 2 new members = (40 - 29) × 2 = 22 years\nTherefore, Increase in the average age on inclusion of 2 new members = 22112211 = 2 years\nTherefore, Average age of 11 members = 29 + 2 = 31 years
Thus, the answer is (B).
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