Bad gums may mean a bad heart. Researchers discovered that 83% of people who have suffered a heart attack had periodontal disease, an inflammation of the gums. Only 35% of healthy people have this disease. Suppose that in a certain community heart attacks are quite rare, occurring with only 15% probability.
A. If someone has periodontal disease, what is the probability that he or she will have a heart attack?
Probability =
B. If 38% of the people in a community will have a heart attack, what is the probability that a person with periodontal disease will have a heart attack?
Probability =

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@dan815

is the answer .1245/.422

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