7 boys take 12 days to complete a job. They worked for 5days, after 5days 2boys left the job. In how many days 5 boys will complete the job ?
Pick one
A) 5 days
B) 6 days
C) 7 days
D) 9 days
E) 9 ⅘ days
7 men can do 1/12 of the job per day   So after 5 days they have completed 5/12th job. Still 7/12 part of the job is to be completed.   5 men can do 1/12 × 5/7 = 5/84 of the job per day   So they will take 7/12 × 84 /5 = 9 ⅘ days to complete the job   (9 ⅘ days)
<result>E</result>
7 boys take 12 days to complete a job. They worked for 5days, after 5days 2boys left the job. In how many days 5 boys will complete the job ?