SOLUTION: 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 m
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Question 263061: 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 70 %.
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
70% of 20 = 14
You need +14 and -6.
P(pass) = (20c14)(1/4)^14*(1/4)^6
P(pass) = 3.5252 x 10^(-8)
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