Mathematics, 16.02.2021 01:10, FlowerChild1229

7. Josh takes a twenty-question multiple-choice exam where each question has five possible answers. Some of the answers he knows, while others he gets right just by making lucky guesses. Suppose that the conditional probability of his knowing the answer to a randomly selected question given that he got it right is 0.92. How many of the twenty questions was he prepared for

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7. Josh takes a twenty-question multiple-choice exam where each question has five possible answers....