SOLUTION: on a 20 question multiple-choice test with four choices for each question, how many questions are likely to be answered correctly by simply guessing each answer?

Question 448846: on a 20 question multiple-choice test with four choices for each question, how many questions are likely to be answered correctly by simply guessing each answer?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
on a 20 question multiple-choice test with four choices for each question, how many questions are likely to be answered correctly by simply guessing each answer?
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Expected value = np = 20(1/2) = 10
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Cheers,
Stan H.
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