# SOLUTION: In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 13 patients using the drug is selected. Find the probabil

Algebra ->  Algebra  -> Probability-and-statistics -> SOLUTION: In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 13 patients using the drug is selected. Find the probabil      Log On

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 Question 611582: In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 13 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(57209)   (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 13 patients using the drug is selected. Binomial Problem with n = 13 and p(side effect) = 0.05 ------- Find the probability that: (A) exactly three will have this mild side effect P(x = 3) = 13C3*0.05^3*(0.95)^0 = 0.02140 ==================== (B) at least two will have this mild side effect. P(2<= x <=3) = 1 - binomcdf(13,0.05,1) = 0.1354 ========================== Cheers, Stan H.