3144. There are 4 red, 6 black and 5 blue pencils in th

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Uploaded: 04.11.2018
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3144. There are 4 red, 6 black and 5 blue pencils in the box. 3 pencils are taken out of it at random. What is the probability that they will be the same color?

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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

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