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

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Q 1412491330.     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`

E

4

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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