Help with Finding Probability of Finding Same colored balls

I have a bag that contains 6 blue, 3 red and 1 yellow balls and I pick 3 balls at random. What is the probability that my 3 chosen balls contains only blue and red color? I tried to solve this using the combinations intuition, but I get 35% as result and the correct answer is 72%. I'm not sure how. Assuming that as soon as I pick, I put the balls back into the bag, how do I even approach this problem? I know that I should be using permutations and combinations, but I lack the intuition behind this. Could someone please explain me this?