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 that 4 or more people will have to be tested until 2 of them with the gene are detected? round your answer to three decimal places (e. g. 0.987). (b) how many people are expected to be tested until 2 of them with the gene are detected? (a) enter your answer in accordance to the item of the question statement.