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preparing for a 2-day meeting and select masks to take with you from a drawer. You have 12 masks to choose: 5 black, 4 blue

preparing for a 2-day meeting and select masks to take with you from a drawer. You have 12 masks to choose: 5 black, 4 blue and 3 red. You select two masks at random. What probability will both masks be black?

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