On a surprise quiz consisting of five true-false questions,…
On a surprise quiz consisting of five true-false questions, an unprepared student guesses each answer.Find the probability that he gets at least one correct.(Hint: it’s easier to think about the chances that he doesn’t get at least one correct, i.e. the chances that they’re all wrong. He’s got a 50% chance on each question, and there are 5 independent questions. If we can compute the probability that they’re all wrong, then the complementary probability represents the probability that at least one is right.)
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