SOLUTION: A quiz cosists of 20 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the mi

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Question 511265: A quiz cosists of 20 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 40 %.
Answer by stanbon(75887) About Me  (Show Source):
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A quiz cosists of 20 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 40 %
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Binomial Problem with n = 20 and p(correct) = 1/6
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20% of 20 = 4
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P(4 <= x <= 20)
= 1 - P(0 <= x <= 3)
= 1-0.5665
= 0.4335
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Cheers,
Stan H.
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