Question 816316
A multiple-choice quiz of nine questions is given. Each question has five possible answers. If a student guesses at all the answers, find the probability that six out of nine are correct. 
--------
Binomial Problem with n = 9 and p(correct) = 1/5
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P(x = 6) = 9C6*(1/5)^6*(5/6)^3 = binompdf(9,1/5,6) = 0.0028
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Cheers,
Stan H.
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