Asked by tiffany

a quiz had 6 questions, each with 4 possible answers (only one of which is correct). If you answer them at random, find the probability that all are correct and at least one is wrong.

Answers

Answered by Steve
I assume you want two answers,since "all are correct and at least one is wrong" is impossible.

P(all correct) = 1/4^6
P(some wrong) = 1 - P(all correct)
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