SOLUTION: Van guessed on all 8 questions of a multiple-choice quiz. Each question has 4 answer choices. What is the probability that he got exactly 1 question correct? Round the answer to th

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Question 873347: Van guessed on all 8 questions of a multiple-choice quiz. Each question has 4 answer choices. What is the probability that he got exactly 1 question correct? Round the answer to the nearest thousandth
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p = .25, n = 8
P(x=1) = 8C1(.25)^1(.75)^7
Binomial Probability
P+%28x%29=+highlight_green%28nCx%29%28p%5Ex%29%28q%29%5E%28n-x%29+
p and q are the probabilities of success and failure respectively.
nCx+=+%28n%21%29%2Fx%21%28n+-+x%29%21%29