Solution of problem N3638 probability theory total prob

Solution of problem N3638 probability theory total prob

3638. Two workers produce parts that go to the control department, and the productivity of the first worker is 4 times the productivity of the second. The probability of receiving a defective part for the 1st worker is 0.15, for the second - 0.05. Find the probability that the selected item is randomly defective.

Additional information:

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

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