The tip off for this problem is the 2 phrases:
With n = 6:
(6 - 1)!
5!
5 x 4 x 3 x 2 x 1 = 120 ways
- circular table
- arranged
With n = 6:
(6 - 1)!
5!
5 x 4 x 3 x 2 x 1 = 120 ways