1. A tool and die press that stamps out cams used in small gasoline engines tends to break down once every five hours. The machine can be repaired and put back on line quickly, but each such incident costs $50. What is the probability that maintenance expenses for the press will be no more than $100 on a typical eight-hour workday?

2. In a new fiber optic communication system, transmission errors occur at the rate of 1.5 per 10 seconds. What is the probability that more than two errors will occur during the next half-minute?

3. Assume that the number of hits, X . that a baseball team makes i n a nine-inning game has a Poisson distribution. If the probability that a team makes zero hits is what are their ch ances of getting two or more hits?

4. Flaws in metal sheeLing produced by a high-temperature roller occur at the rate of one per 10 square feet. What is the probability t ha t three or more flaws will appear in a 5-by-S-foot panel?