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A can do a work in 72 days and B in 90 d...

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

`(3)/(4)`

B

`(1)/(4)`

C

`(4)/(5)`

D

`(5)/(6)`

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The correct Answer is:
A
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