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6.A multiple choice test has 20 questions, each with four possible answers. If students randomly guessed on every question the average number of questions answered

6.A multiple choice test has 20 questions, each with four possible answers. If students randomly guessed on every question the average number of questions answered correctly would be 5 with a standard deviation of 1.94. If this Binomial distribution is approximated with a normal curve what percentage of students would pass this test by randomly guessing on every question? (3 marks)

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