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10.9% of the population is 65 or older. Find the probability that the following number of persons selected at random from 25

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Answer #1

X ~ Bin (n,p)

Where n = 25 , p = 0.109

P(X) = nCx * px * ( 1 - p)n-x

P(X = 25) = 25C25 * 0.10925 * (1 - 0.109)0

= 0.000

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