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Probability of getting 9 correct answers, or less than 6 correct answers

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A True-False test has 20 questions with each having 2 possible answers with one correct. Assume a student randomly guesses the answer to every question.

a. What is the probability of getting exactly 9 correct answers?

b. What is the probability of getting less than 6 correct answers?

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Solution Summary

The expert determines the probability of getting exactly 9 correct answers out of 20. The probability of getting less than 6 correct answers is also provided.

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5. A True-False test has 20 questions with each having 2 possible answers with one correct. Assume a student randomly guesses the answer ...

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