A can do a job in 15days and B in 20days. If they work on it together for 8 days, then the fraction of the work that is left is? Choose the correct choice from the following answers:
A) 2/15	B) 8/15	C) 3/11	D) 1/12	E) 1/15
A's 1 day work = 1/15   B's 1day work = 1/20   A+B 1day work = 1/15 + 1/20  +  1= 
<gadget id="calculator"> +  1</gadget>
<output>1</output>
1/15 + 1/20= 7/60   A+B 8days work = 7/60*8 = 14/15   Remaining work = 1 - 14/15 = 1/15   Answer is 1/15
<result>E</result>
A can do a job in 15days and B in 20days. If they work on it together for 8 days, then the fraction of the work that is left is?