BrezDaqhAmafiqah BrezDaqhAmafiqah

12-08-2016
Mathematics

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An exam consists of 15 true-or-false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly 9 questions correctly? (Round your answer to three decimal places.).

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taskmasters taskmasters

14-08-2016

C(15,9) (1/2)^9 (1/2)^6 = 5005/32768 = .153 approx

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