Assignment:
Customer arrivals at a bark are random and independent: the probability of an arrival in any one-minute period is the same as the probability of an arrival in any other one-minute period. Answer the following questions. assuming a mean arrival rate of three customers per minute.
a. What is the probability of exactly three arrivals in a one-minute period?
b. What is the probability of at least three arrivals in a ore-minute period?
Provide complete and step by step solution for the question and show calculations and use formulas.