3044. In the box 20 balls, of which 5 are green and 15

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3044. In the box 20 balls, of which 5 are green and 15 are red. 2 balls are successively taken out of the box; The first ball in the box does not return. Find the probability that the first ball is turned out to be green, and the second - red.

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

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