Question 442564: In a multiple choice examination, each question has 5 possible answers, only one of which is correct. If a candidate chooses his answers at random, what is the probability that, in a test of such questions, he gets none right?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In a multiple choice examination, each question has 5 possible answers, only one of which is correct. If a candidate chooses his answers at random, what is the probability that, in a test of such questions, he gets none right?
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Prob of getting a particular question wrong is (4/5)
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Assuming there are "n" questions, P(none right) = (4/5)^n
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Cheers,
Stan H.
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