The mean number of hurricanes to strike the U.S. mainland per year from 1851 through 2015 was about 1.7. Find the probability that the number of hurricanes striking the U.S. mainland in any given year from 1851 through 2015 is 

(a) Exactly one, 

(b) At most one, and 

(c) More than one.

Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine whether the events are unusual. If convenient, use a table or technology to find the probabilities.