## A group contains n men and n women. How many ways are there to arrange these people in a row if the men and women alternate?

Relevant definitions to solve this exercise: “THE PRODUCT RULE Suppose that a procedure can be broken down into a sequence of two tasks. If there are n1 ways to do the first task and for each of these ways of doing the first task, there are n2 ways to do the second task, then there …