Question 896186: A multiple-choice test consists of 9 questions. Each question has answer choices of a, b, c, d, and e, and only one of the choices is correct. If a student randomly guesses on each question, what is the probability that she gets fewer than 2 of them correct?
Carry your intermediate computations to at least four decimal places, and round your answer to at least two decimal places.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A multiple-choice test consists of 9 questions. Each question has answer choices of a, b, c, d, and e, and only one of the choices is correct. If a student randomly guesses on each question, what is the probability that she gets fewer than 2 of them correct?
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Binomial Problem with n = 9 and p(correct) = 1/5
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P(0<= x <=1) = binomcdf(9,1/5,1) = 0.4362
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Cheers,
Stan H.
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