An employee of the records of ce at a certain university currently has ten forms on his desk awaiting processing. Six of these are withdrawal petitions and the other four are course substitution requests.
a. If he randomly selects six of these forms to give to a subordinate, what is the probability that only one of the two types of forms remains on his desk?
b. Suppose he has time to process only four of these forms before leaving for the day. If these four are randomly selected one by one, what is the prob- ability that each succeeding form is of a different type from its predecessor?
87. One satellite is scheduled to be launched from Cape Canaveral in Florida, and another launching is scheduled for Vandenberg Air Force Base in Cali- fornia. Let A denote the event that the Vandenberg launch goes off on schedule, and let B represent the event that the Cape Canaveral launch goes off on schedule. If A and B are independent events with P(A) > P(B) and P(A U B) = .626, P(A n B) = .144, determine the values of P(A) and P(B).