Solution of problem N2829 probability theory

Solution of problem N2829 probability theory

2829. In the urn 3 white, 4 red and 5 blue balls. 3 balls are taken out of the urn. What is the probability that:
1) They are all the same color;
2) Among them are 1 white and 2 red balls?

Additional information:

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

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