3051. In the urn there are 6 blue, 6 red and 10 white balls. Allow the ball to be removed from the urn without returning it. Find the probability that a white ball appears at the first extraction (event A), at the second - a red ball (event B), at the third - a blue ball (event C).

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