Solution of problem N3826 probability theory total prob

Solution of problem N3826 probability theory total prob

3826. Casting in blanks comes from two preparation shops: 70% from the first and 30% from the second. Marriage in the work of the first workshop is 2%, and the second 3%. Find the probability that a random pig taken at random is benign.

Additional information:

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