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9 July, 06:38

A student takes an exam containing 18 true or false questions. If the student guesses, what is the probability that he will get exactly 6 questions right? Round your answer to four decimal places.

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  1. 9 July, 06:50
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    Use this formula.

    and solution is:[ (18!) / (6! * (18-6) !) ] * (1/2) ^6 * (1-1/2) ^ (18-6) ≈0.0781604

    7.8%
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