An automobile manufacturing plant produced 36 vehicles today: 17 were vans, 13 were trucks, and 6 were sedans. Plant managers are going to select two of these vehicles for a thorough inspection. The first vehicle will be selected at random, and then the second vehicle will be selected at random from the remaining vehicles. What is the probability that two vans will be selected? Do not round your intermediate computations. Round your final answer to three decimal places.