On a 9 question multiple-choice test, where each question has 5 answers, what would be the probability of getting at least one question wron

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On a 9 question multiple-choice test, where each question has 5 answers, what would be the probability of getting at least one question wrong?

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Edana Edana 5 years 2021-07-23T19:19:45+00:00 1 Answers 46 views 0

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  1. Amity
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    2021-07-23T19:21:11+00:00
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    Answer:

    P(at least one wrong) = 1- P(all correct) =1-.25^6=1-1/4096=4095/4096. This assumes that the answers are picked at random. This kind of question is always the complement of an extreme binomial outcome.

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