A can do a piece of work in 10 days and B can do it in 15 days and C can do it 20 days. They started the work together and A & B leaves after 2 days simultaneously from the beginning. How long will work lost?	Choose the correct choice from the following choices.
A) 14 1/3 B) 10 1/3 C) 11 1/3 D) 12 1/3 E) 13 1/3
2/10 + 2/15 + x/20 = 1   x = 40/3 = 13 1/3   Answer: 13 1/3
<result>E</result>
A can do a piece of work in 10 days and B can do it in 15 days and C can do it 20 days. They started the work together and A & B leaves after 2 days simultaneously from the beginning. How long will work lost?