3025. In the urn 10 balls: 6 white and 4 black. They to

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3025. In the urn 10 balls: 6 white and 4 black. They took out 2 balls in a row. What is the probability that:
a) Both balls are white;
b) Both balls of 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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