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Probability questions: heart disease and periodontal disease

Bad gums may mean a bad heart. Researchers discovered that 85% of people who had suffered a heart attack during a given calendar year also had periodontal disease, an inflammation of the gums. Only 29% of people who had not suffered a heart attack had periodontal disease, and only 1% of the population suffers a heart attack during a given calendar year.

Put your answers in the indicated cells. Show how you determined your answers, using Excel formulas.
For a person randomly selected from this population, what is the probability that:
A) The person had periodontal disease and had a heart attack during the calendar year?
B) The person had periodontal disease?
C) The person had periodontal disease or had a heart attack, but not both?
D) Among those who had periodontal disease, what is of also having had a heart attack during the year?
E) Among those who have not had periodontal disease, what is the probability of not having had a heart attack during the calendar year?

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Solution Summary

The probability of inflammation of the gums is analyzed. Periodontal diseases are analyzed.

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