During lunch time,customers arrive at Bob's Drugs according to a Poisson distribution with λ = 4 per minute.
a.During a one-minute interval,determine the following probabilities: (1)no arrivals; (2)one arrival; (3)two arrivals;and, (4)three or more arrivals.
b.What is the probability of two arrivals in a two-minute period?
c.What is the probability that no more than 30 seconds elapses between arrivals?

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The Answer of During lunch time,customers arrive at Bob's Drugs according to a Poisson distribution with λ = 4 per minute.
a.During a one-minute interval,determine the following probabilities: (1)no arrivals; (2)one arrival; (3)two arrivals;and, (4)three or more arrivals.
b.What is the probability of two arrivals in a two-minute period?
c.What is the probability that no more than 30 seconds elapses between arrivals?

During Lunch Time,customers Arrive at Bob's Drugs According to a Poisson