A and B can complete a work in 12 days and 15 days respectively. If they work together for 4 days, h

A. 1/5

B. 1/4

C. 1/3

D. 1/2

E. None of the above

Answer: B. 1/4

A and B together can complete 1/12 + 1/15 = 1/60 of the work in a day. In 4 days, they complete 4/60 = 1/15 of the work, leaving 14/15 of the work.

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