SOLUTION: suppose it is known that 30% of a certain population are immune to some disease. if a random sample of size 10 is selected from this population, what is the probabilty that at leas

Algebra ->  Test -> SOLUTION: suppose it is known that 30% of a certain population are immune to some disease. if a random sample of size 10 is selected from this population, what is the probabilty that at leas      Log On


   

Question 910775: suppose it is known that 30% of a certain population are immune to some disease. if a random sample of size 10 is selected from this population, what is the probabilty that at least 2 individuals will be immune?
Found 2 solutions by stanbon, ewatrrr:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
suppose it is known that 30% of a certain population are immune to some disease. if a random sample of size 10 is selected from this population, what is the probabilty that at least 2 individuals will be immune?
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Binomial Problem with n = 10 and p(immune) = 0.30
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P(2<= x <=10) = 1 - P(0<= x <=1) = 1 - binomcdf(10,0.3,1) = 0.8507
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Cheers,
Stan H.
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Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(immune) = .30, n = 10
P(x ≥ 2) = 1 - P(x ≤ 1) = 1 - binomcdf(10,.30,1)