Answer:
20 customers per hour
Step-by-step explanation:
Utilization = Demand rate per hour / Number of employee * Service rate
Utilization = 90% = 0.90
Number of Counter employee = 2
Demand rate = 36 per hour
Hence, 0.90 = 36 / 2 * Service rate
0.90 = 18 / Service rate
Service rate * 0.90 = 18
Service rate = 18 / 0.90
Service rate = 20 customers per hour