# SOLUTION: A vaccine is 80% effective in preventing Type B influenza. In other words, 80% of those receiving the vaccine will not catch this type of flu. A random sample of 100 people has b

Algebra ->  Algebra  -> Probability-and-statistics -> SOLUTION: A vaccine is 80% effective in preventing Type B influenza. In other words, 80% of those receiving the vaccine will not catch this type of flu. A random sample of 100 people has b      Log On

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 Question 322383: A vaccine is 80% effective in preventing Type B influenza. In other words, 80% of those receiving the vaccine will not catch this type of flu. A random sample of 100 people has been given the vaccine. What is the probability that at least 75 will not catch this type of flu?Answer by stanbon(57361)   (Show Source): You can put this solution on YOUR website!A vaccine is 80% effective in preventing Type B influenza. In other words, 80% of those receiving the vaccine will not catch this type of flu. A random sample of 100 people has been given the vaccine. What is the probability that at least 75 will not catch this type of flu? ----------- Binomial with n = 100 and p = 0.8 --- P(75<= x <=100) = 1 - binomcdf(100,0.8,74) = 0.9125 --------------------- Cheers, Stan H.