Question #132977

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 +”?


1
Expert's answer
2020-09-16T15:11:18-0400

P(x=3)=c35(0.4)3(0.6)2=0.2304P(x=3)=c_{3}^{5}(0.4)^{3}(0.6)^{2}=0.2304


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