SOLUTION: A multiple choice trivia quiz has 10 questions, each with 5 possible answers. If someone guesses each answer randomly, what is the probability of acheiving 80% or better on the tes
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Question 875863: A multiple choice trivia quiz has 10 questions, each with 5 possible answers. If someone guesses each answer randomly, what is the probability of acheiving 80% or better on the test? Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! p(c0rrect) =.2, n = 10
80% is 8 correct
Using TI
P(x ≥ 8) = 1 - binomcdf(10, .2, 7) = .00008 0r .008%
