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3990. The store has televisions with imported and domes 2019

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Description

3990. The store has televisions with imported and domestic CRT in the ratio of 8: 2. The probability of failure during the warranty period of the TV with an imported kinescope is 0.01, with domestic - 0.015. Randomly selected TV. Find the probability that it will withstand the warranty period.

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Additional information

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

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