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Answer : 4 15.25 yrs Explanation : Answer: D) 15.25 yrs Explanation: Total ages of 80 boys = 15 x 80 = 1200 yrs.Total age of 16 boys = 15 x 16 = 240 yrsTotal age of 25 boys = 14 x 25 = 350 yrs.Average age of remaining boys = 1200 - (240 350) / 80 - (25 15) = 610/41 = 15.25 yrs.

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