Working alone A can do a work in 72 days and B in 90 days. If they wor – McqOptions

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1.	Working alone A can do a work in 72 days and B in 90 days. If they work on it together for 10 days, then what fraction of work is left?
A.	1 / 4
B.	3 / 5
C.	1 / 5
D.	3 / 4
Answer» E.

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