Probability of At Least One Let A = the event of getting at least 1 defective pacemaker battery when 3 batteries are randomly selected with replacement from a batch. If 5% of the batteries in a batch are defective and the other 95% are all good, which of the following are correct?

a. P1A2 = 10.95210.95210.952 = 0.857

b. P1A2 = 1 - 10.95210.95210.952 = 0.143

c. P1A2 = 10.05210.05210.052 = 0.000125