If A, B and C together can finish a piece of work in 2 days. A alone in 12 days and B in 18 days, then C alone can do it in?	Pick one.
A) 5 days  B) 4 days  C) 3 days  D) 2 days  E) 7 days
3 days = 1/2 - 1/12 – 1/18 = 1/3 =&gt; 3 days   ANSWER:3 days
<result>C</result>
If A, B and C together can finish a piece of work in 2 days. A alone in 12 days and B in 18 days, then C alone can do it in?