Question 867255: It has been estimated that only 27% of the people who need vision correction wear glasses. The others wear either contact lenses or have had eye surgery or do not bother with correcting their vision. In a sample of 20 people, what is the probability that fewer than 8 wear glasses?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! It has been estimated that only 27% of the people who need vision correction wear glasses. The others wear either contact lenses or have had eye surgery or do not bother with correcting their vision. In a sample of 20 people, what is the probability that fewer than 8 wear glasses?
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Binomial Problem with n = 20 and p(wear) = 0.27
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P(x < 8) = binomcdf(20,0.27,7) = 0.8545
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Cheers,
Stan H.
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