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

A and B together can complete 1/15 + 1/20 = 7/60 of the work in one day. In 5 days, they complete 7/12 of the work, leaving 5/12.

Posted in: Time & Work - Aptitude - Mathematics