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4082. In the taxis, the number of new and old cars is 3 2019

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4082. In the taxis, the number of new and old cars is 3: 5. The probability of breakage of the new machine is 0.2 and the old 0.4. The car on the line broke down. What is the probability that this car is old?

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Additional information

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

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