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Problem 3


Use the table below, which is from a study on heart disease and smoking, to find the probability that a randomly selected member of the study was a smoker given that they have heart disease.

Risk Factor           Heart Disease                     No Heart Disease                  Total
Smoker                        25                                         10                                   35
Nonsmoker                  14                                         51                                   65
Total                             39                                         61                                 100


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