SOLUTION: A multiple choice quiz consists of 50 questions, each with 4 possible answers. Find the mean for the number of correct answers, if a student guesses on each question.
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Question 1086125: A multiple choice quiz consists of 50 questions, each with 4 possible answers. Find the mean for the number of correct answers, if a student guesses on each question. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! E(X), the expected value (mean) is x*p(x)
This is 50*0.25, the probability of guessing one correctly.
That would be 12.5
