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Joint, Marginal and conditional probabilities.

A study of consumer smoking habits includes 161 people in the 18-22 age bracket, 50 who smoke. There are 144 people in the 23-30 age bracket, 35 who smoke, and 80 people in the 31-40 age bracket, 28 who smoke. Arrange this data into a table. If one person is randomly selected from this sample, what is the possibility of getting someone who is in the 23-30 age brackets or whom smokes?

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