The southeast regional manager of General Express, a private parcel-delivery firm, is worried about the likelihood of strikes by some of his employees. He has learned that the probability of a strike...

Extracted text: The southeast regional manager of General Express, a private parcel-delivery firm, is worried about the likelihood of strikes by some of his employees. He has learned that the probability of a strike by his pilots is 0.75 and the probability of a strike by his drivers is 0.65. Further, he knows that if the drivers strike, there is a 90 percent chance that the pilots will strike in sympathy. (a) What is the probability of both groups' striking? (b) If the pilots strike, what is the probability that the drivers will strike in sympathy?