Solution of problem N1634 probability theory

Solution of problem N1634 probability theory

1634. Two boxes contain 15 pieces each, in the first 10, and in the second 12 standard parts. A detail was taken from the first drawer and moved to the second. Find the probability that at random, the item extracted from the second box will be standard.

Additional information:

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

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