4321. There are 3 white and 7 black balls in the box. W

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Description 4321. There are 3 white and 7 black balls in the box. W

4321. There are 3 white and 7 black balls in the box. What is the probability that two balls drawn at random will turn out to be white.

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

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