Question

In a large population, 70 % of the people have been vaccinated. If 3 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated?

Answer 1

.95

Explanation:

= 1 - Bin (n=4, k =0, p=.52)

= 1 - C(4,0) × 0.520 × (1-.52)4-0

= 1 - (1×.484) = .9469158 ≈ .95

hopefully this helped