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OpenStudy (anonymous):
please help :( 1.A short multiple choice test has 4 questions. Each question has 5 choices, exactly one of which is correct. Willie has not studied for the test, so he guesses answers at random. b.) calculate his probabilities of guessing 0,1,2,3 and 4 answers right. I was given this formula: Pr(x)=nCx * Px (1-p) n-x it would be a big help if someone helped me solve this. thankyou.
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