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28-12-2022
Mathematics

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A student, lives within walking distance of 6 restaurants. Unbeknownst to her, she has exactly 1 friend at 3 of the restaurants, she has 2 friends at 2 of the restaurants, and she has no friends at one of the restaurants. Suppose that this accounts for all of her friends. Supposing that she chooses a restaurant at random, what is the probability she will have at least one friend at the restaurant

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