problem 2 (10 points): there is a going out of business sale at a computer store, where there are 100 computers of which 10 are defective. you buy 4 computers. 1. what is the probability that all 4 are good? 2. what is the probability that 3 are good and 1 is defective? 3. what is the probability that 2 are good and 2 are defective?