Discussion
The average weight of 8 men is increased by 1.5 kg when one of the men, who weighs 65 kg, is replaced by a new man. The weight of the new man is:
Answer: C
The total increase in weight for the group of 8 men is 8 × 1.5 kg = 12 kg.
This increase is the difference between the new man's weight and the old man's weight.
Weight of new man = Weight of old man + Total increase
Weight of new man = 65 kg + 12 kg = 77 kg.
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