The probability that at least one is type O is 0.8704.
What is a binomial distribution probability?
A value's likelihood of taking one of two independent values is summarised by the statistical distribution known as the binomial distribution.
Given, 40 % of the population has type O blood and 4 people are randomly selected to be donors
Then, binomial distribution can be given by
X ~ = Binomial(n = 4, p = 0.4)
P(at least one type O)
P[X ≥ 1]
= 1- P[X < 1]
= 1- P[X = 0]
= [tex]1 -C(4,0) * (0.4)^{0} * (1 - 0.4)^{4-0}[/tex]
=1-0.1296
=0.8704
Hence, the probability that at least one is type O is 0.8704.
To learn more about a binomial distribution probability
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