The Owner of an Amusement Park Has Decided to Open

Multiple Choice

The owner of an amusement park has decided to open a second entry booth and hire another employee to service customers entering the park.Customers arrive at the rate of 20 per hour and will wait in a single line until one of the two employees is available to provide service.The average service time of both employees is 2 minutes to provide service.The arrival rate follows Poisson distribution,and the service time follows a negative exponential distribution.Determine the average number of customers waiting in line.

A) 0.75
B) 0.89
C) 0.08
D) 0.98