5.29 Catalog Age lists the top 17 U.S. ?rms in annual catalogsales. Dell Computer is number one followed by IBM and W.W.Grainger. Of the 17 ?rms on the list, 8 are in some type ofcomputer-related business. Suppose four ?rms are randomly selected.a. What is the probability that none of the ?rms is in some type ofcomputer-related business? b. What is the probability that all four?rms are in some type of computer-related business? c. What is theprobability that exactly two are in non-computer-relatedbusiness?
