SOLUTION: You take a 10 question multiple choice test. Each question has 4 choices and you randomly guess on each. What is the probability of getting 7 questions correct?
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Question 804734: You take a 10 question multiple choice test. Each question has 4 choices and you randomly guess on each. What is the probability of getting 7 questions correct? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! You take a 10 question multiple choice test. Each question has 4 choices and you randomly guess on each. What is the probability of getting 7 questions correct?
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Binomial Problem with n = 10 and p(correct) = 1/4
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P(x = 7) = 10C7*(1/4)^7*(3/4)^3 = binompdf(10,1/4,7) = 0.0031
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Cheers,
Stan H.
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