question_answer

A group of certain number of men can complete a job in 5 days. On every alternate day starting from second day, 3 men are withdrawn from the job and on every alternate day starting from third day, 2 men are added to-the job. If the job is completed in 6 days, what is the number of persons who started the job?

A)  10

B)  12

C)  15                               

D)  Cannot be determined                 

E)  None of these