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Mathematics, 23.11.2021 15:00 xyxenpaiz5386

Sean has a box of pens. The box contains 6 blue pens, 8 black pens and 3 red pens. Some more blue pens are added to the box. The probability of selecting a blue pen is now ½. How many blue pens were added to the box?

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Sean has a box of pens. The box contains 6 blue pens, 8 black pens and 3 red pens. Some more blue pe...
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