SOLUTION: A test consists of 10 multiple choice questions with five choices for each question. As an experiment,
you GUESS on each and every answer without even reading the questions.
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you GUESS on each and every answer without even reading the questions.
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Question 1033561: A test consists of 10 multiple choice questions with five choices for each question. As an experiment,
you GUESS on each and every answer without even reading the questions.
What is the probability of getting exactly 7 questions correct on this test? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A test consists of 10 multiple choice questions with five choices for each question. As an experiment,
you GUESS on each and every answer without even reading the questions.
What is the probability of getting exactly 7 questions correct on this test?
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Binomial Problem with n = 10 and p(correct) = 1/5
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P(x = 7) = 10C7*(1/5)^7*(4/5)^3 = binompdf(10,1/5,7) = 0.000786..
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Cheers,
Stan H.
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