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  1. B

    Probability of choosing 4 sick people from 100 where there is a probability of 8.6% for each of them to have a disease.

    I have the following task: There is 4% of sick people in a population. There is 5% chance for a positive test for a healthy person. There is 2% chance for a negative test for a a sick person. We tested 100 people and 4 had a positive test. What is the probability of such an outcome? So far I...