railway RRB JE (CBT I + CBT II) Mock Test 2024 Industrial Engineering Operations Research Queueing Theory
On an average, 5 customers reach a barber’s shop every hour. Determine the probability that exactly 2 customers will reach in a 30-minute period, assuming that the arrivals follow Poisson distribution. Formula would be:
1
e-m * mn/n!
2
em * mn/n!
3
1 - e
4
None of the above