Question 617199: In testing a new drug, researchers found that 1% 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 one will have this mild side effect
B. at least one will have this mild effect.
N= 12
P= .01
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In testing a new drug, researchers found that 1% 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:
Binomial problems with n = 12 and p(side effect) = 0.01
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A. Exactly one will have this mild side effect
P(x = 1) 12C1*0.01^1*0.99^11 = binompdf(12,0.01,1) = 0.1074
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B. at least one will have this mild effect.
P(x >= 1) = 1 - P(x = 0) = 1 - 0.99^12 = 0.1136
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Cheers,
Stan H.
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