A car rental agency currently has 41 cars available, 28 of which have a GPS navigation system. Two cars are selected at random from these 41 cars. Find the probability that both of these cars have GPS navigation systems

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  1. prob = (28/41)(27/40) = 189/410


    number of ways to choose 2 cars = C(41,2) = 820
    number of ways to choose 2 cars with GPS = C(28,2) = 378
    prob of picking two GPS cars = 378/820 = 189/410

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