Exhibit 13.4 The Following Questions Refer to the Information and Output Below

Short Answer

Exhibit 13.4
The following questions refer to the information and output below.
A grocery store can serve an average of 360 customers per hour. The service times are exponentially distributed. The store has 4 checkout lines each of which serves 90 customers per hour. Customers arrive at the store at a Poisson rate of 240 customers per hour. The following queuing analysis spreadsheet was developed from this information.
-Refer to Exhibit 13.4. Based on this report what percent of the time is a grocery clerk busy serving a customer?