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Function: require_once
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Line: 367
Function: require_once
Unknown to a medical researcher, 66 out of 22 patients have a heart problem that will result in death if they receive the test drug. 99 patients are randomly selected to receive the drug and the rest receive a placebo. What is the probability that at least 55 patients will die? Express your answer as a fraction or a decimal number rounded to four decimal places.