Let the random variable X represent the number of correct responses on a multiple-choice quiz that has
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Question:
Let the random variable X represent the number of correct responses on a multiple-choice quiz that has 10 questions. Each question has five multiple-choice answers.
1. What is the probability that the random variable X is greater than or equal to 9 if the person taking the quiz randomly guesses?
2. What is the expected value (or mean value) of X if the person randomly guesses? What is the interpretation of this value?
3. What is the standard deviation of X if the person randomly guesses?
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