SOLUTION: Bad gums may mean a bad heart. Researchers discovered that 81% of people who have suffered a heart attack had periodontal disease, an inflammation of the gums. Only 28% of healthy

Question 1168482: Bad gums may mean a bad heart. Researchers discovered that 81% of people who have suffered a heart attack had periodontal disease, an inflammation of the gums. Only 28% 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?
B. If 43% 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?

Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.
Bad gums may mean a bad heart. Researchers discovered that 81% of people who have suffered a heart attack had
periodontal disease, an inflammation of the gums. Only 28% 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?

B. If 43% 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?
~~~~~~~~~~~~~~

This passage from your post perplexes me

    " . . . 28% of healthy people have this disease."

Is it possible to consider a person to be healthy if he (or she) suffers a disease ?

And what about the unhealthy people then ?

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