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