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 thisdisease. Suppose that in a certain community heart attacks arequite rare, occurring with only 14% probability.
A. If someone has periodontal disease, what is the probabilitythat 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 willhave a heart attack?
Probability =
