SOLUTION: 11.1% of the population is 65 or older . Find the probability that the following number of persons selected at random from 20 people are 65 or older . The probability that exactly

Algebra ->  Probability-and-statistics -> SOLUTION: 11.1% of the population is 65 or older . Find the probability that the following number of persons selected at random from 20 people are 65 or older . The probability that exactly       Log On

 

Hi,

p = .111, n = 20

Using TI ****(highly recommended for cumulative probabilities)

This singular

P(x = 4) = binompdf(20, .111, 4)

Or

Using  

P(x = 4 )= 4845(.111)^4(.889)^16