freedomridercao freedomridercao

17-06-2018
Mathematics

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8. In a large population, 63% of the people have been vaccinated. If 4 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated?

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sqdancefan sqdancefan

17-06-2018

The probability that none of the four have been vaccinated is
(1-0.63)^4 = 0.01874161

The probability that at least one has been vaccinated is the complement of this,
≈0.9813

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