Solution of problem N3806 probability theory total prob

Solution of problem N3806 probability theory total prob

3806. The assembly shop of the plant receives parts from three machines. The first machine gives 3% of the marriage, the second - 1%, the third - 2%. Determine the probability of contact with the assembly of a defective part, if the shop received 500, 200 and 300 parts, respectively, from automata.

Additional information:

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