1/3 of the population has type O+ blood. What is the probability that 2 out of 4 people will have type O+ blood? Please provide an explanation. Thanks!

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- October 18th 2012, 06:30 PMclintonh0610Statistics Probability Problem
1/3 of the population has type O+ blood. What is the probability that 2 out of 4 people will have type O+ blood? Please provide an explanation. Thanks!

- October 18th 2012, 06:56 PMMaxJasperRe: Statistics Probability Problem
P[x=2|p=1/3,n=4]=8/27

Use binomial distribution.