SOLUTION: A drug is known to be 80% effective in curing a certain disease. If four people with the disease are to be given the drug, the probability that more than two will be cured is? Answ

Question 332867: A drug is known to be 80% effective in curing a certain disease. If four people with the disease are to be given the drug, the probability that more than two will be cured is? Answer 0.8192
Referring to the previous question. The expected number of people cured is?
Answer by jrfrunner(365) (Show Source): You can put this solution on YOUR website!
let X=number of cured people
X~binomial (n,p) or in this case X~binomial(4,0.8)
Expected value of X =E(X) =Mu = n*p = 4*0.8=3.2
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