1. Seven of the 15 campus police officers available for assignment to the auditorium in which a local politician is to speak have received advanced training in crowd control. If 5 officers are randomly selected for service during the speech, what is the probability that exactly 2 of them will have had advanced training in crowd control? What is the probability that at least 3 of them will have had advanced training?
2. A producer of copper tubing has found that, on the average, five flaws occur per 2000 feet of tubing. The tubing is sold in continuous rolls of 200 feet each. What is the probability that a randomly selected 200-foot roll will have no flaws?