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Guessing multiple choice questions

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You are taking a multiple-choice quiz that consists of 3 questions. Each question has 4 possible answers, only one of which is correct. To complete the quiz, you randomly guess the answer to each question. Find the probability of guessing (a) exactly 2 answers correctly, (b) at least 2 answers correctly, or (c) less than 2 answers correctly.

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Solution Summary

The questions calculates the probability of success in guessing many multiple choice questions based on binomial probabilities.

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