SOLUTION: nicoles is taking a 5 question multiple choice test. if she completely guesses every answer, and each question has 4 choices, waht is the probability that she gets at most one wron

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Question 874975: nicoles is taking a 5 question multiple choice test. if she completely guesses every answer, and each question has 4 choices, waht is the probability that she gets at most one wrong.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(correct) = .25, p(wrong) = .75, n = 5
P(x≤ 1 wrong) = P(0wrong) + P(1wrong) = %28.75%29%5E0%28.25%29%5E5+%2B+5C1%28.75%29%5E1%28.25%29%5E4
0r
P(x≤ 1 wrong) = binomcdf(5, .75, 1) = .0156