3733. On three machines of different brands a specific part is manufactured. The performance of the first machine per shift is 40 parts, the second - 35 parts, the third - 25 parts. It is established that 2, 3 and 5% of the production of these machines, respectively, have hidden defects. At the end of the shift, one part was taken for control. What is the probability that it is non-standard?

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