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7. Three hundred customers attended a menu tasting event at a restaurant. Each customer picks one of four dinner menus and decides if it is

7. Three hundred customers attended a menu tasting event at a restaurant. Each customer picks one of four dinner menus and decides if it is "Good", "OK", or "Bad". The results are summarized in the following contingency table. Menu 1 2 3 4 Good 20 20 40 20 OK 30 30 10 20 Bad 30 50 20 10 a. What is the probability that a customer gets dinner menu 1 and finds it OK? b. If a customer picks dinner menu 3, what is the probability that this customer finds it not bad? c. If a customer finds the dinner good, what is the probability that the customer chose dinner menu 4? d. Are the following two events independent? A customer picks dinner menu 2, and a customer finds the dinner OK

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