Probability question.?

Question

4 married couples are arranged in a row,find the probability that no husband sits next to his wife.

Answer 1

The math to do this is long and I didn't want to write it out. Instead I wrote some simple computer code and ran a simulation to find that there are 8! = 40320 possible permutations of the 8 people.

of these permutations, there are 13824 permutations were the spouses are not sitting next to each other.

the probability is therefore 13824/40320 = 12/35 = 0.342857

Answer 2

ayna apo aya, naglaka met dayta saludsodmo. awan la iti sabalin.