Question 867903: A quiz consists of 20 multiple-choice questions, each with 4 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 20 %
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A quiz consists of 20 multiple-choice questions, each with 4 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 20 %
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Binomial Problem with n = 20 and p(correct) = 1/4
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Note:: 0.20*20 = 4
P(4 <= x <= 20) = 1 - binomcdf(20,1/4,3) = 0.7748
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Cheers,
Stan H.
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