Problem 4.14 In the manufacturing of pill packages for a particular drug, there is a proportion of 5% packages that are defective. we select a packages for quality control. (a) Suppose that n = 25 packages are veried for defects. What is the probability that at least one package will be defective? (1)) Among n = 25 packages, what is the expected number of defective packages? (c) How man}r packages should we select to he at least 90% certain to have at least one defective package among them