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Random guesses (S). A multiple-choice test has 100 questions; each quest ion has four possible answers from which to choose. Each question is worth one point, and no points are taken off for choosing an incorrect answer. Someone decides to take the test by selecting answers randomly. What is the probability that a person taking this test gets 100%? Suppose now that the person actually reads the questions, is able to eliminate two of the incorrect choices, and then guesses randomly from the other two choices. What is the probability that the person gets 100%?
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EBK THE HEART OF MATHEMATICS: AN INVITA
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