Human papillomavirus. In a particular population, 20% of the individuals are human papillomavirus carriers. Select four individuals

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Human papillomavirus. In a particular population, 20% of the individuals are human papillomavirus carriers. Select four individuals at random from this population.

(a) Build the pmf for the number of HPV+ individuals in the sample.

(b) What is the probability of finding at least one carrier in the sample?

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