Question: A website manager has noticed that during the evening hours, about 3 people per minute check out from their shopping cart and make an online

A website manager has noticed that during the evening hours, about 3 people per minute check out from their shopping cart and make an online purchase. She believes that each purchase is independent of the others and wants to model the number of purchases per minute.
a) What model might you suggest to model the number of purchases per minute?
b) What is the probability that in any 1 minute at least one purchase is made?
c) What is the probability that no one makes a purchase in the next 2 minutes?

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