SOLUTION: In a large population, 66% 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?

Question 1196782: In a large population, 66% 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?

Answer by ikleyn(52878) (Show Source): You can put this solution on YOUR website!
.


The probability that NO ONE of 4 has been vaccinated is  

     =  = 0.01336.


Then the probability under the question is the complement to it

    P = 1 - 0.01336 = 0.98664   (rounded).    ANSWER

Solved.

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