4312. In the box are 10 white balls and black ones. Tak

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Description 4312. In the box are 10 white balls and black ones. Tak

4312. In the box are 10 white balls and black ones. Take out two balls at random. What is the probability that they are of different colors?

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

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