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Question: Fill 'er up! In a recent month, 88% of automobile drivers filled their vehicles with regular gasoline, 2% purchased midgrade gas, and 10% bought premium gas. Of those who bought regular gas, 28% paid with a credit card; of customers who bought midgrade and premium gas, 34% and 42%, respectively, paid with a credit card. Suppose we select a customer at random.

(a) Draw a tree diagram to represent this situation.

(b) Find the probability that the customer paid with a credit card. Show your work.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92570887

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