A group of men decided to do a work in 40 days, but 5 of them became absent. If the rest of the group did the work in 60 days, Find the original number of men? Choose the correct answer
A) 60	B) 15	C) 40	D) 10	E) 25

Rationale: "original number of men = 5 * 60 / ( 60 - 40 ) = 15 answer is b"
Answer: B