4.5 is wrong

what is b?

Altug's Coffee Shop decides to install an automatic coffee vending machine outside one of its stores to reduce the number of people standing in line change. The service time is a constant 3.00 minutes, and the arrival rate is 15 per hour (Poisson distributed). a) The average wait time in the line = 45 minutes (round your response to two decimal places). b) The average number of customers waiting in the line = 4,5 customers (round your response to throw decimal places). reduce the number of people standing in line inside. Mehmet Altug charges $3.50 per cup. However, it takes too long for people to make buted). tee decimal places)