Solution of problem N3937 probability theory total prob

Solution of problem N3937 probability theory total prob

3937. The watches are made in 3 factories and go to the store. The first plant produces 40% of products, the second - 45%, the third - 15%. In the production of the first plant, 80% of hours rush, the second - 70%, the third - 90%. What is the probability that a purchased watch is in a hurry?

Additional information:

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

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