Choose an american household at random and let the random variable x be the number of cars (including suvs and light trucks) they own. given is the probability distribution if we ignore the few households that own more than 5 cars. number of cars 0 1 2 3 4 5 probability 0.09 0.36 0.35 0.13 0.05 0.02 what is the expected number of cars in a randomly selected american household?