During lunchtime, customers arrive at Bob's Drugs according to a Poisson distribution with ? = 4 per minute. During a one-minute interval, determine the following probabilities:
a. no arrivals; b. 1 arrival; c. 2 arrivals; and, d. 3 or more arrivals.
e. What is the probability of 2 arrivals in a two-minute period?
a. .0183
b. .0733
c. .1465
d. .7619
e. .0107
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