SOLUTION: 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 c
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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. (See Example 3. Round your answer to four decimal places.)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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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