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The average number of annual trips per family to amusement parks in the United States is Poisson distributed, with a mean of 0.6 trips per year.What is the probability of randomly selecting an American family and finding the following?

a. The family did not make a trip to an amusement park last year.

b. The family took exactly one trip to an amusement park last year.

c. The family took two or more trips to amusement parks last year.

d. The family took three or fewer trips to amusement parks over a three-year period.

e. The family took exactly four trips to amusement parks during a six-year period.

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