SOLUTION: 5. 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 proba

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Question 309143: 5. 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) About Me  (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.
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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
P(x=3) = 0.05^3 = 0.125
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(B) at least two will have this mild side effect.
P(2<=x<=12) = 1 - P(0<= x <=1) = 0.1184
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Cheers,
Stan H.