Answer:
d. 24 customers per hour
Explanation:
Utilization (U) = Demand Rate/[Service Rate x Number of Servers]
Demand = 36 per hour
Utilization = 75% = 0.75
Number of Servers = 2
Putting values in formula, we have
0.75 = 36 / (SR * 2)
Service rate = 36 / (0.75*2)
= 24 customers per hour
Hence the correct option is d. 24 customers per hour