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