SOLUTION: An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right?
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Question 420712: An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right?
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E(x) = mean = np = 25(1/5) = 5 (# he can expect to get right)
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Cheers,
Stan H.
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