Question

Five married couples have bought 10 seats in the same row for a concert. In how many different ways can they be seated ​(a) with no​ restrictions? ​(b) if each couple is to sit​ together? ​(c) if all the men sit together to the right of all the​ women?

Answer 1

a) 10! b)5!.2!.2!.2!.2!.2! c) 5!.2!