SOLUTION: You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on

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Question 746085: You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the test?
Help much needed and appreciated.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the test?
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Binomial Problem with n = 10 and p(correct) = 1/4
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P(2<= x <=10) = 1 - P(0<= x <=1) = 1-binomcdf(10,1/4,1) = 0.756
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Cheers,
Stan H.
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