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Statement of a problem № m550

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In a clinical study, volunteers are tested for a gene that has been found to increase the risk for a disease. The probability that a person carries the gene is 0.1. (a) What is the probability 4 or more people will have to be tested before 2 with the gene are detected? (b) How many people are expected to be tested before 2 with the gene are detected?

Solution:
In a clinical study, volunteers are tested for a gene that has been found to inc

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