Medical studies have shown that 10 out of 100 adults have heart disease. When a person with

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Medical studies have shown that 10 out of 100 adults have heart disease. When a person with heart disease is given an EKG test, a 0.9 probability exists that the test will indicate the presence of heart disease. When a person without heart disease is given an EKG test, a 0.95 probability exists that the test will indicate that the person does not have heart disease. Suppose that a person arrives at an emergency room complaining of chest pains. An EKG is given that indicates that the person has heart disease. What is the probability that the person actually has heart disease?

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