Gina started to solve the following probability problem as shown below:
Three men and four women line up at a checkout counter at a store. Find the probability that the first two people in line are men and the last two people in line are women.
What is the correct next step to solve the problem?
A. 6 â€¢ 3 = 18
B. 6/3 = 2
C. 6 + 3 = 9
D. 6 – 3 = 3