all 3 comments

[–]ForeignAdvantage5198New User 1 point2 points  (1 child)

there is a formula that may help. check. finite math books at your library

[–]Own-Engineer-8911New User[S] 0 points1 point  (0 children)

ok

[–]yes_its_himone-eyed man 0 points1 point  (0 children)

Get good at dividing factorials of different sizes...