92. A doctor has decided to prescribe two new drugs to 200 heart patients, as follows : 50 get drug A, 50 get drug B and 100 get both. Drug A reduces the probability of a heart attack by 35 percent, drug B reduced the probability by 20 per cent, and the two drugs, when taken together, work independently. The 200 patients were chosen so that each has an 80 per cent chance of having a heart attack. If a randomly selected patient has a heart attack, what is the probability that the patient was given both drugs ?

92. A doctor has decided to prescribe two new drugs to 200 heart patients, as follows : 50 get drug A, 50 get drug B and 100 get both. Drug A reduces the probability of a heart attack by 35 percent, drug B reduced the probability by 20 per cent, and the two drugs, when taken together, work independently. The 200 patients were chosen so that each has an 80 per cent chance of having a heart attack. If a randomly selected patient has a heart attack, what is the probability that the patient was given both drugs ?

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter9: Counting And Probability

Section: Chapter Questions

Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...

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