Mathematics, 22.04.2020 00:35 sngarcia
A test contains twenty true false questions. A student either knows the answer to a question, or guesses at random if he does not know the answer. On any question, the student knows the answer with probability .7. What is the probability that he gets exactly 2 of the twenty questions wrong, if his performance on different questions is independent
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A test contains twenty true false questions. A student either knows the answer to a question, or gue...
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