question 4, 4a and 4b

Interstate buses are required to go through a safety inspection center. Buses arrive at the center at the average rate of 60 an hour and the average service rate is 20 buses per hour per inspector. Currently there are four inspectors on duty. How many buses, on average, would you expect to see at the safety inspection center, including those being checked? 1.333 buses 1.528 buses 4.528 buses 3 buses Interstate buses are required to go through a safety inspection center. Buses arrive at the center at the average rate of 60 an hour and the average service rate is 20 buses per hour per inspector. Currently there are four inspectors on duty What is the probability that all four inspectors would be busy at the same time? 0.962 0.5093 0.038 0.75 Which one of the following answers is true? High volume/repetitive operations have high material (input) handling cost have more complex operations planning have more room for flexibility have less work-in-process inventory