Probabilities

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Company has 90 cars in stock with 4 cylinder engines and 290 with 6 cylinder engines. There are no other cars in stock. 130 of these cars, including 20 of those with 4 cylinder engines have air conditioning. One car on the lot is selected at random. The probability that this car has air conditioning, given that it has a 6 cylinder engine is?

Is it possible to solve this on a TI-83?

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