There are lot of similar questions available. After going through all, I am still confused with two different answers.
Question : How many ways can three married couples sit around a round table if husband and wife must sit together?
Base on the explanation available in the book , I get the answer as $(3-1)! * 2^3 = 16$. This explanation is also clear to me.
However, after reading further here, the number of ways in which three couples can be arranged around a circular table so that no wife sits next to her husband $= 120 -144 + 72 -16 = 32$ (based on inclusion and exclusion). If so, the number of ways where a wife sits next to her husband should be $5! - 32 = 88$.
I know I am wrong. I am still trying hard to understand where I have gone wrong. Please help.