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Question: the class is egen 350 pleas i need the answers...

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the class is EGEN 350 pleas i need the answers of questions 7,8and 9

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 0.001. a. (2pts) What is the probability that 40 people need to be tested to detect one with the gene? 7. b. (2pts) What is the expected number of people to test to detect one with the gene? (3pts) A university warehouse has received a shipment of 25 printers, of which 10 are laser printers and 15 are inkjet models. If 6 of these 25 are selected at random to be checked by a particular technician, what is the probability that exactly 2 of those selected are laser printers? 8. Heart failure is due to either natural occurrences (87%) or outside factors (13%). Natural occurrences are caused by arterial blockage, disease, and infection. Outside factors are related to induced substances or foreign objects Suppose that 20 patients will visit an emergency room with heart failure. Assume that causes of heart failure between individuals are independent. a. (3pts) What is the probability that exactly 2 individuals have conditions caused by outside factors? 9, b. (3pts) What is the probability that more than 2 individuals have conditions caused by outside factors?

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