4828. There are 25 parts in a box, 19 of which are painted. Two parts are taken out at random. Find the probability that: both extracted parts will be painted; one part is painted and the other is unpainted (the order of appearance of the parts is not taken into account); at least one of the two parts will be painted.
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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