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OpenStudy (anonymous):

On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a heart attack. The doctors told her that the reliability of the stress test is 67%. What is the probability that Erin will not have a heart attack and the test predicts that she will? A. 0.099 B. 0.201 C. 0.231 D. 0.469

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