1. The utilization of a machine is 70 percent. The machine has a design capacity of 100 units per hour and an effective capacity of 80 units per hour. Find the efficiency of the machine.
2. A major television manufacturer has determined that its 44 inch screens have a mean service life that can be modeled by a normal distribution with a mean of 6 years and a standard deviation of one-half year.
What is the probability that the service life of that product is between 5 and 7 years?