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Suppose at a lab, serum tests for hepatitis b antibodies are positive 90% of the time....

Suppose at a lab, serum tests for hepatitis b antibodies are positive 90% of the time. If 50 patient samples were tested

a. What is the probability that all of the samples are positive?

b. What is the probability that no more than 2 samples are positive

c. What is the probability that at least 3 samples are positived.

What is the mean expected number of positive results in these 50 lab tests

Math   Statistics-And-Probability   
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