Answer:
a) ρ = 0.8333
b)W=0.249 hr
W= 14.94 min
Step-by-step explanation:
Job arrive in rate = λ
λ = 20 per hour
Service rate = μ
μ = 60 /2.5 per hour
μ =24 per hour
a)
Utilization of machine ρ

By putting the values


ρ = 0.8333
b)
Time spend at station W



Lq=4.15
Now by putting the values

W=0.249 hr
W= 14.94 min