Discussion Forum
Que.  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 
Correct Answer:8/15

Que.  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 
Correct Answer:8/15
