In how many ways can five married couples be seated around a circle so that spouses sit together?
I tried 5! = 120 but I am not sure if my answer meets all conditions set in the question.
In how many ways can five married couples be seated around a circle so that spouses sit together?
I tried 5! = 120 but I am not sure if my answer meets all conditions set in the question.
Permitting the five couples around the circle we have $\frac{5!}{5}=4!$ to account for the rotations of a permutation being the same. (I.e. 12345 is the same permutation as 23451 when placed in a circle. )
Then you can permute individuals within each couple. There are 2! Arrangements for each couple.
Thus the total arrangements is $4!*(2!)^5$