Question

The efficiency of a woman is 33.33% less than that of a man, whose efficiency is three times that of a child. If 2 children, 3 women, and 4 men together can complete a task in 25 days, how many additional men are needed to assist 2 children and 4 women so that the task is completed in 20 days?

A 2
B 4
C 5
D 3
E 6
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