Tom is the custodian at the local high school. He has a circular keyring with 9 keys on it. How many different arrangements of those keys can Tom make on his key ring? A 72 different arrangements

B) 81 different arrangements

C) 2,432 different arrangements

D) 40,320 different arrangements

#2
A bag contains 10 red, 6 blue and 4 green jelly beans. If a jelly bean is chosen at random from the bag, what is the probability that

it is not blue?

A) 1/3

B) 3/10

C) 7/10<<< I thought it was this but I'm not entirely sure.

D) 7/20