SOLUTION: A quiz cosists of 20 multiple-choice questions, each with 5 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the mi
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Question 362855: A quiz cosists of 20 multiple-choice questions, each with 5 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 40 % Answer by robertb(5830) (Show Source):
You can put this solution on YOUR website! To pass the test he has to get at least 8 correct answers (40% of 20). The probability of a correct answer is 1/5 = 0.20, a wrong answer, 4/5 = 0.80.
Therefore the probability that he passes is - ... -.
