Question 324237: A quiz consists of 20 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers; what is the probability of passing, if the minimum passing grade is 40 %?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A quiz consists of 20 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers; what is the probability of passing, if the minimum passing grade is 40 %?
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Note: 40% of 20 = 8
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Binomial Problem with n = 20, p = 1/6
P(x>=8) = 1 - binomcdf(20,1/6,7) = 0.0113
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Cheers,
Stan H.
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