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Mathematics 11 Online
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OpenStudy (rishabh.mission):

The chances of a patient having a heart attack is 40%. According to latest research Drug A reduces the risk of heart attack by 30% and drug B reduces its chances by 25%. At a time a patient can choose any one of the two options with equal probabilities. It is given that after going through one of the two options the patient selected at random Suffers a heart attack. Find the probability that the patient had been prescribed Drug A.

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