A and B can complete a work in 15 days and 20 days respectively. If they work together for 5 days, h

A. 1/3

B. 1/4

C. 1/5

D. 1/6

E. None of the above

Answer: A. 1/3

In 5 days, A does 1/3 of the work and B does 1/4 of the work. Together they complete 7/12 of the work, leaving 5/12.

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