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There are 100 multiple-choice question on exam, each having responses a, b, c, d. Suppose that a student has a 60% chance to answer each

There are 100 multiple-choice question on exam, each having responses a, b, c, d. Suppose that a student has a 60% chance to answer each question correctly, and all the answers are independent. If the student needs to answer at least 40 questions to pass, what is the probability that the student passes? Use normal approximation

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