10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?  Pick.
A) 2  B) 1  C) 7  D) 6  E) 4
1 women's 1 day work = 1/70   1 child's 1 day work = 1/140   (5 women + 10 children)'s 1 day work   = (5/10 + 10/140) = (1/14 + 1/14) = 1/7   5 women and 10 children will complete the work in 7 days.   Answer:7
<result>C</result>
10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?