# Question

The number of bank robberies that occur in a large North American city is Poisson distributed with a mean of 1.8 per day. Find the probabilities of the following events.

a. Three or more bank robberies in a day

b. Between 10 and 15 (inclusive) robberies during a 5-day period

a. Three or more bank robberies in a day

b. Between 10 and 15 (inclusive) robberies during a 5-day period

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