You have a 5-question multiple-choice test. Each
question has four choices. You don’t know any of the answers. What is the
experimental probability that you will guess exactly three out of five
Binomial Problem with n = 5 and p(correct) = 1/4
P(x = 3) = 5C3(1/4)^3*(3/4)^2 = binompdf(5,1/4,3) = 0.0879
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