neverfearlove4554 neverfearlove4554

09-07-2021
Mathematics

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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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swangmo722 swangmo722

09-07-2021

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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