A contractor undertook to do a piece of work in 15 days. He employed certain number of laboures but 5 of them were absent from the very first day and the rest could finish the work in only 20 days. Find the number of men originally employed ?	Select the correct option.
A) 25
B) 20
C) 19
D) 23
E) 18

Rationale: "let the number of men originally employed be x . 15 x = 20 ( x â € “ 5 ) or x = 20 answer b"
Answer: B