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Bad gums may mean a bad heart. Researchers discovered that 78% of people who have suffered...

Bad gums may mean a bad heart. Researchers discovered that 78% of people who have suffered a heart attack had periodontal disease, an inflammation of the gums. Only 29% of healthy people have this disease. Suppose that in a certain community heart attacks are quite rare, occurring with only 14% probability.

A. If someone has periodontal disease, what is the probability that he or she will have a heart attack?

Probability =

B. If 44% 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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