Question
The average weight of 8 persons increased by 1.5 kg when
a person weighing 65 kg is replaced by a new person. What could be the weight of a new person?Solution
Since the average increased by 1.5 kg, and there are 8 people,
Total increase in weight=1.5 × 8 = 12 kg
New person is 12 kg heavier than the person replaced:
Weight of new person = 65 + 12 = 77 kg
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