A can do a work in 15 days and B in 20 days. if they work on it togeth – McqOptions

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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.	7/15
B.	1/4
C.	8/15
D.	1/10
Answer» D. 1/10

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