Solution of problem N3936 probability theory total prob

Solution of problem N3936 probability theory total prob

3936. The watches entering the store are made in three factories. The first plant produces 40% of products, the second 15%, the third - 45%. Among the first factory hours, 80% rush, the second factory - 90%, the third - 70%. What is the probability that a watch bought at random is in a hurry?

Additional information:

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