Question
The average age of a group of 30 men is 32 years. Five
men, whose average age is 24 years, leave the group. What is the new average age of the remaining men in the group?Solution
Total age of all the men in the group = 30 X 32 = 960 years Total age of the 5 men who left = 24 X 5 = 120 years So, total age of the 25 remaining members of the group = 960 - 120 = 840 years So, required average = 840 ÷ 25 = 33.6 years
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