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a. Suppose that the chance of having both a "favorable" survey and an unsuccessful product launch is 2. In addition, the frequency of "favorable" market surveys over all new products is .5. Then what is the chance of a successful product launch given a favorable survey?

b. In a large metropolitan area, it has been determined that one out of five drivers on the road on a Saturday night is intoxicated. Also, half of all accidents on Saturday nights involve drunk drivers. Based on this information, by what factor does the risk of having an accident increase due to driving while intoxicated?

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