statistics 2
posted by oscar .
A football team consists of 20 each freshmen and sophomores, 15 juniors and 10 seniors. Four players are selected at random to serve as captains. Find the probability that:
a) all four are seniors
b) There is one each: freshman, sophomore, junior and senior.
c) There are 2 sophomores and 2 freshmen
d) At least one of the students is a senior

Total players = 65
a) 10/65, 9/64....
b) 20/65, 20/64, 15/63, 10/62 (multiply)
Use the same principles as previous post.