Answer:
Option c is right
Step-by-step explanation:
Given that a suburban specialty restaurant has developed a single drive-thru window. Customers order, pay, and pick up their food at the same window. Arrivals follow a Poisson distribution while service times follow an exponential distribution.
service rate per customer = [tex]\frac{15}{2} =7.5[/tex]
Average number of arrivals per hour = 6
Service time for 6 customers = [tex]7.5*6=45[/tex] minutes
i.e. on an average per hour the server is buy in 45 minutes
Proportion = [tex]\frac{45}{60} =0.75[/tex]
Option c is right
