Question 670901: Assume that on a standardized test of 100 questions, a person has a probability of 85% of answering any particular question correctly. Find the probability of answering between 74 and 84 questions, inclusive, correctly.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Assume that on a standardized test of 100 questions, a person has a probability of 85% of answering any particular question correctly. Find the probability of answering between 74 and 84 questions, inclusive, correctly.
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Binomial Problem with n = 100 and p(correct) = 0.85
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P(74 <= x <= 84) = binomcdf(100,0.85,84)-binomcdf(100,0.85,73) = 0.4303
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Cheers,
Stan H.
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