Two men can complete as much work as 3 women can do in a certain time. Ten men and 6 women can complete work in 5 days. If 4 men and 9 women work together, then in how many days will they be able to complete the same work?
1
8
2
7
3
\(6\frac{1}{2}\)
4
\(7\frac{1}{2}\)