Question 531499: You have 15 questions, with 5 answers to each, 1 being the correct choice. What is the probability of getting 2 correct answers?
Answers: .0044
.4288
.4618
.2309
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! You have 15 questions, with 5 answers to each, 1 being the correct choice.
What is the probability of getting 2 correct answers?
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Binomial Problem with n = 15 and p(correct) = 1/5
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P(x=2) = 15C2*(1/5)^2*(4/5)^13 = binompdf(15,1/5,2) = 0.2309
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You either posted the wrong problem or the wrong answers
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Cheers,
Stan H.
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Answers:
.0044
.4288
.4618
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