Of six cars produced at a particular factory last Monday morning, three are known to be defective. Three of the six cars were shipped to dealer A and the other three to dealer B. Just by chance, all three defective cars were shipped to dealer A. What is the probability of this occurring if, in fact, the three cars shipped to dealer A were randomly selected? Solution p(A)=1/2*1/2*1/2 =1/16.