statistics

25. Suppose a population consists of 10 items, 6 of which are defective. A sample of 3 items is selected. What is the probability that exactly 2 are detective? 26. Suppose a population consists of 15 items, 10 of which are acceptable. A sample of 4 items is selected. What is the probability that exactly 3 are acceptable? 27. Kotzak Appliance Outlet just received a shipment of 10 TV sets. Shortly after thay were received, the manufacturer called to report that he had inadvertently shipped 3 defective sois. MS. Kolzak, the owner of the outlet, decided to test 2 of the 10 sets she received. What is the probability that neither of the 2 sets tested was defective? 28. The Computer Systems Department consists of eight faculty, six of whom are tenured. Dr. Vonder, the chairman, wants to establish a committee of three department faculty members to review the curriculum. If she selects the committee at random; a. What is the probability all members of the committee are tenured? b. What is the probability that at least one member is not tenured? (Hint: For this question use the complement rufe.) 29. Keith's Porists has 15 delivery trucks, used mainly to deliver flowers and flower arrangements in the Tulsa area. Suppose 6 of the 15 trucks have brake problems, Five trucks were selected at random to be tested. What is the probablety that 2 of those tested have defective brakes? 30. Professor Jon Hammer has a pool of 15 multiple-choice questions regarding probability distributions. Four of these questions involve the hypergeometric distribution. What is the probability at least 1 of these hypergeometric questions will appear on the 5-question quiz on Monday