Answer to Question #132977 in Statistics and Probability for Sidra

Question

In a locality 40% population has “O +” blood group. A sample of 5 persons is taken for blood donation, what is the probability that 3 out of 5 will have their blood group “O +”?

Answer 1

$P(x=3)=c_{3}^{5}(0.4)^{3}(0.6)^{2}=0.2304$