According to a traffic safety administration organization, the rate of seat belt use in a certain country

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Question:

According to a traffic safety administration organization, the rate of seat belt use in a certain country for 2009 was 83%. Suppose that you looked at two people, selected randomly and independently from the population, to see whether each had his or her seat belt fastened in 2009.

a. What is the probability that neither person had her or his belt fastened?

b. What is the probability at least one person had her or his belt fastened?