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4110. There are 1600 lamps, 300 belong to the first bat 2019

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Description

4110. There are 1600 lamps, 300 belong to the first batch, 800 - the second batch, 500 - the third batch. In the first batch of 4%, in the second - 7%, in the third - 2% 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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