Solution of problem N3934 probability theory total prob

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3934. Watches of the same brand are made in three factories and arrive at the store. The first plant produces 20% of all products, the second - 30%, the third - 50%. In the production of the first plant, 5% of all hours are in a hurry, the second - 3%, the third - 2%. What is the probability that the watches bought in the store are in a hurry?

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

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