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 leaves after 3 days and B leaves after 2 days from the beginning. How long will work lost? Choose the correct choice from the following choices.
A) 10 1/3  B) 12 1/3  C) 11 1/3  D) 13 1/3  E) 9 1/3
3/10 + 2/15 + x/20 = 1   x = 34/3 = 11 1/3   Answer: 11 1/3
<result>C</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 leaves after 3 days and B leaves after 2 days from the beginning. How long will work lost?