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4107. There are 1,300 lamps, 400 belong to the first ba 2019

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Description

4107. There are 1,300 lamps, 400 belong to the first batch, 300 to the second batch, 600 to the third batch. In the first batch of 8%, 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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