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Mathematics, 22.04.2020 14:20 LarryJoeseph

30 people visited Paris 13 visited the Eiffel Tower, 16 visited Notre dam and 7 visited neither.
What's the probability that a person chosen at random only visited one of these places

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30 people visited Paris 13 visited the Eiffel Tower, 16 visited Notre dam and 7 visited neither.
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