Question 295031: In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected. Find the probability that:
(A) exactly three will have this mild side effect
(B) at least two will have this mild side effect.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected.
Binomial Problem with n= 12 ; p = 0.05
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Find the probability that:
(A) exactly three will have this mild side effect
binompdf(12,0.05,3) = 0.01733..
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(B) at least two will have this mild side effect.
1-binomcdf(12,0.05,1) = 0.1184..
Cheers,
Stan H.
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