engineering recuitment HPCL Junior Executive 2025 Mock Test Industrial Engineering Operations Research Queueing Theory
Customers arrive at one personal barber shop according to a Poisson process with a mean inter-arrival time of 20 minutes. Customers spend on an average of 15 minutes, in the barber's chair. Determine how much time can a customer expect to wait for his turn.
1
30 minutes
2
15 minutes
3
45 minutes
4
20 minutes