A can do a work in 10 days and B in 20 days. If they together work on – McqOptions

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1.	A can do a work in 10 days and B in 20 days. If they together work on it for 5 days, then the fraction of the work that is left is:
A.	1/4
B.	4/3
C.	3/4
D.	3/20
Answer» B. 4/3

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