quiz has 10 multiple choice questions. Each question has 5  possible answers, one of which is correct. A correct answer is worth 8 points but 2 points are taken off for each incorrect answer. A student answers all the questions by guessing at random.  A typical amount that a score is off from the expected value is _____ points

Q: A quiz has 10 multiple-choice questions. Each question has 5  possible answers, one of which is…

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A: Formula :

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