1. A basketball player makes 60% of her free throws. She takes 7 free throws in a game. If the shots are independent of each other, the probability that she makes 5 out of the 7 shots is about
A. 0.012.
B. 0.261.
C. 0.523.
2. When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random dialing machine make 15 calls. X is the number that reach a live person.Does X have a binomial distribution?
A. Yes, the calls are independent, each one has two possibilities, and the probability of reaching a live person is the same for each call.
B. No, the calls are independent, each one has two possibilities, but the probability of reaching a live person is not the same for each call.
C. No, the calls are not independent.
D. No, the calls are independent, but each one has more than two possibilities.