Your brother is saving labels from soup cans. he removes labels from three cans of pea soup, five cans of vegetable soup and from four cans of onion soup. he neglects to indicate the contents on the unlabeled cans. you need two cans of onion soup to make stew. what is the probability that two cans selected at random will both be onion soup? enter your answer in decimal notation of a percent rounded to four decimal places.