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

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.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><td align="center">4</td></table>
B.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4</center></td></tr><td align="center">3</td></table>
C.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><td align="center">20</td></table>
D.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td></tr><td align="center">4</td></table>
Answer» E.

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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

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