Mathematics
Mathematics, 12.03.2020 16:42, notcollin2416

You take an exam that contains 20 multiple-choice questions. Each question has 4 possible options. You know the answer to 10 questions, but you have no idea about the other 10 questions so you choose answers randomly. Your score X on the exam is the total number of correct answers. Find: Range(X), the numbers P(X = 15), P(X ≥ 18), as well as E(X).

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You take an exam that contains 20 multiple-choice questions. Each question has 4 possible options. Y...

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