A man is 40% more efficient than a woman, and a child is

40% less efficient then a woman. 3 men, 5 women, and 4

children work for 7 days to complete a job. How many days

will 2 men, 7 women and 3 children take to complete the

same job?

A. 4.5 days`

B. 5.5 days

C. 6.5 days

D. 7 days