Question

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

Answer 1

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

or

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