Discussion

Explanation:

Let the weight of the person coming in is X kgs.

The average of 8 men increases by 1.5 kg, hence the total weight increases by 8 × 1.5 = 12 kgs.

This is becase the person coming is 12 kgs heavier than the person going out.

∴ X - 65 = 12

⇒ X = 77

Hence, option (d).

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