Probability and Stats

Question

A basketball team consists of 12 freshman, 8 sophomores, 9 juniors, and 5 seniors. 4 players are selected at random to serve as captains. Find the following probabilities.

1. All 4 are seniors
2. One from each grade level
3. Two sophomores and two freshmen
4. At least 1 student is a senior

Answer 1

1. All 4 are seniors
2. One from each grade level
3. Two sophomores and two freshmen
4. At least 1 student is a senior

1) (12C0)*(8C0)*(9C0)*(5C4)/(34C4)

Now try the rest