Question

  In a barber, the rate for the number of customers is 3 per hour. On average, the barber can serve customers at a rate of one every 15 minutes.

A)  Find an average number of the customers in the barber (system) and queue?

B)   Find average waiting time in the barber and queue?

C)   What is the probability that the barber be empty?

D)   What is the probability that exactly 2 customers present in the system?

C)  with which probability that the number of customers in the system can be between 7 and 10?

Answer 1