Solution of problem N4517 probability theory

Solution of problem N4517 probability theory

4517. There are 5 white and 4 black balls in the urn. Two balls are taken out of the urn at random. What is the probability that it will be a) two white balls, b) two black balls, c) one black and one white ball.

Additional information:

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

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