A can do a work in 15 days and B in 20 days. If they work on it together for 4 days then the fraction of the work that is left is?

A can do a work in 15 days and B in 20 days. If they work on it tog

1.	A can do a work in 15 days and B in 20 days. If they work on it together for 4 days then the fraction of the work that is left is?
A.	1/4
B.	1/10
C.	7/15
D.	8/15
Answer» E.

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A can do a work in 15 days and B in 20 days. If they work on it together for 4 days then the fraction of the work that is left is?

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