A can do a piece of work in 12 days and B can do it in 15 days and C can do it 20 days. They started the work together and A leaves after 2 days and B leaves after 4 days from the beginning. How long will work lost?
Choose the correct choice from the following choices:
A) 15 1/3
B) 16 1/3
C) 17 1/3
D) 18 1/3
E) 25 1/3
2/12 + 4/15 + x/20 = 1   x = 46/3 = 15 1/3   15 1/3NSWER:15 1/3
<result>A</result>
A can do a piece of work in 12 days and B can do it in 15 days and C can do it 20 days. They started the work together and A leaves after 2 days and B leaves after 4 days from the beginning. How long will work lost?