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A can do a work in 20 days and B in 40 days. If they work on it together for 5 days, then the fraction of the work that is left is ?

Correct Answer: 5/8

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Math MCQ: A can do a work in 20 days and B in 40 days. If they work on it together for 5 days, then the fraction of the work that is left is ? | Extra Education