A can do a piece of work in 4 days. B can do it in 15 days. With the assistance of C they completed the work in 24 days. Find in how many days can C alone do it?	Answers
A) 0.391 days  B) 0.491 days  C) 0.331 days  D) 1.391 days  E) 0.301 days
C = 1/2 - 1/24 - 1/15 = 0.391 days   0.391 daysNSWER:0.391 days
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A can do a piece of work in 4 days. B can do it in 15 days. With the assistance of C they completed the work in 24 days. Find in how many days can C alone do it?