Solution of problem N3812 probability theory total prob

Solution of problem N3812 probability theory total prob

3812. Two machines produce parts entering the common conveyor. The probability of marriage on the first machine is 0.04, on the second 0.06. The performance of the first machine is three times the performance of the second. Find the probability that a piece taken from the conveyor is unbroken.

Additional information:

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