A can do a piece of work in 4 days. B can do it in 10 days. With the assistance of C they completed the work in 2 days. Find in how many days can C alone do it?  Choose the correct answer
A) 22 days
B) 20/3 days
C) 67 days
D) 17/6 days
E) 18 days
C = 1/2 - 1/4 - 1/10 = 3/20   =&gt; 20/3 days   Answer:20/3 days
<result>B</result>
A can do a piece of work in 4 days. B can do it in 10 days. With the assistance of C they completed the work in 2 days. Find in how many days can C alone do it?