5! = 5 x 4 x 3 x 2 x 1 = 120. Total possible combinations.
correct for rotational symmetry by dividing by 5 because you don’t care about which seat is “first”
so 1:24 seems correct…
but I feel like 1:12 is more correct because they shouldn’t care about clockwise vs counter clockwise either.
edit. I feel like I remember getting this question when learning about factorials