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Mathematics, 13.04.2021 20:50 mandilynn22

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

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A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is t...

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