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5 February, 09:53

A box contains 3 red pens, 5 blue pens, and 9 green pens. Two pens are drawn out of the box without replacement. What is the probability of drawing a blue pen on the first draw and the same color pen on the second draw?

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  1. 5 February, 13:24
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    Since there is a total of 17 pens and 2 are removed then there is 15 left. the probability is 5/17 on the first draw and 4/16 (simplified is 1/4) on the second draw.
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