Решение задачи N3990 теория вероятностей полная вероятн

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.

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