Customers arrive at a single self-serve coffee machine in a busy mall at the rate of 25 per hour, following Poisson distribution. Each customer takes exactly 2 minutes to get his or her coffee.

What is Arrival rate? () per hour

What is the service rate? () per day

What is average number in waiting lines. (L_q ) = ( up to 2 d.p.)

What is average number in waiting lines. (L_s ) =

What is the expected waiting time in the system (in hours) for a typical customer? (W_s ) = hrs Or minutes