Question 713241: A student studying for a vocabulary test knows the meanings of 10 words from a list of 22 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows? (Round your answer to three decimal places.)
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A student studying for a vocabulary test knows the meanings of 10 words from a list of 22 words. If the test contains 10 words from the study list, what is the probability that at least 8 of the words on the test are words that the student knows? (Round your answer to three decimal places.)
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Binomial Problem with n = 10 ; p(knows) = 10/22 = 5/11
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P(8<= x <=10) = 1 - P(0<= x <=7) = 1 - binomcdf(10,5/11,7) = 0.0293
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Cheers,
Stan H.
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