The manager of a grocery store in Decatur currently provides special service to people who still use checks to pay for food. They have a separate pay/bag line for people who insist on waiting for a dollar total to pull out their checkbook and start writing. On average, 30 customers per hour arrive at the checking pay/bag line and they can be modeled with a Poisson distribution. The clerk at this line can handle an average rate of 35 customers per hour and their service can be modeled with exponential distribution.

Question

Question 6 1 pts 6. What service rate would be required to have customers average only 8 minutes in the system? O 40.5 O 36.5 O 37.5 O 30.5 Question 7 1 pts 7. For the service rate in question 6, what is the probability of having more than four check writers in the system? O a. 67% O b. 75% O c. 33% O d. 25%