Correct Answer: Option D

Explanation

Mean × number = total.   Initial total (= 50n)

After two men (55 and 63) leave:

Remaining men (= n - 2)

New mean (= 49)

50n - 118 = 49(n - 2)

50n - 118 = 49n - 98

50n - 49n = -98 + 118 = 20.

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