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Solution of problem N3877 probability theory total prob

Content: teorver_3877.doc (24.50 KB)
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3877. A batch of parts is made by three workers, with the first worker producing 25% of all parts, the second worker 35%, the third 40%. In the production of the first working defect is 3%, in the production of the second 4%, in the production of the third 2.5%. What is the probability that an item randomly selected for inspection will be defective?
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
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