3823. Casting in blanks comes from two shops: 70% from

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3823. Casting in blanks comes from two shops: 70% from the first shop and 30% from the second. At the same time, the material of the first workshop has 10% of defects, and the second - 20%. Find the probability that the random pig is free from defects.

Additional information

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

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