Answer:
Average number of vehicles in the queue is 4.4 ≅ 4 veh/min
Average waiting time of a vehicles in the queue = 1.05 veh/min
Explanation:
Step1 :- Given λ = 4.2 veh/min
and μ= 5 veh/min
a) Average number of customers in the queue
E(m) =


on simplification, we get
Average number of vehicles in the queue is 4.4 ≅ 4 veh/min
b) Average waiting time of a customer in the queue


on simplification, we get
Average waiting time of a vehicles in the queue = 1.05 veh/min