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4113. There are 1000 lamps, 350 belong to the first bat 2019

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Description

4113. There are 1000 lamps, 350 belong to the first batch, 250 - to the second batch, 400 - to the third batch. In the first batch of 6%, in the second - 5%, in the third - 3% of defective lamps. One lamp is selected at random. Determine the probability that the selected lamp is defective.

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Additional information

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

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