SOLUTION: Let X be the number ofcorrect answers if a students guesses randomly from the 5 choices for each of the 25 questions. What is the probability distribution of X?
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Question 696172: Let X be the number ofcorrect answers if a students guesses randomly from the 5 choices for each of the 25 questions. What is the probability distribution of X?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Let X be the number ofcorrect answers if a students guesses randomly from the 5 choices for each of the 25 questions. What is the probability distribution of X?
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It's a binomial distribution with
u = np = 25*(1/5) = 5
and
s = sqrt(npq) = sqrt(5(4/5)) = 2
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Cheers,
Stan H.
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