9) It is known that all items produced by a certain machine will be defective with a probability of .2, independently of each other. What is the probability that in a sample of three items, that exactly one will be defective?
A. 0.0010
B. 0.3840
C. 0.7290
D. 0.0270
10) It is known that all items produced by a certain machine will be defective with a probability of .2, independently of each other. What is the probability that in a sample of three items, that at most one will be defective?
A. 0.7290
B. 0.9999
C. 1.0000
D. 0.8960
