Question 1078571: A quiz of 4 multiple choice questions, each with 3 choices, was given. A student needs either 3 or 4 right to pass the quiz, but is totally clueless. What is his probability of passing by pure guesswork?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A quiz of 4 multiple choice questions, each with 3 choices, was given. A student needs either 3 or 4 right to pass the quiz, but is totally clueless. What is his probability of passing by pure guesswork?
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Binomial Problem with n = 4 and p = 1/3
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P(3<= x <=4) = 1 - binomcdf(4,1/3,2) = 0.1111
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Cheers,
Stan H.
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