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In a box, there are 3 red pens, 2 green pens and 1 blue pen. Johan picks a pen blindfoldly. The probability of picking a red pen or a green pen is . |
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Answer» In a box, there are 3 red pens, 2 green pens and 1 blue pen. Johan picks a pen blindfoldly. The probability of picking a red pen or a green pen is |
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