... probability of two red balls: 12182 9 3 . 2. The probability of two blue balls: 36181 9 2. 3. The probability of two yellow balls: 6183 9 4 . The total probability in column ... possibilities. The second digit can be anything but the first, thus 9 possibilities. The third has only 8 left. The number of combinations is 9 x 9 x 8 = 648 and therefore column B is greater. 20. A: ... numbers on it: 1, 3, 5, 7, 9 and 11. The best answer is A. There are 36 results in total (6 x 6). Column A: there are 5 results with a sum of 10: 3-7, 7-3, 5-5, 9- 1, 1 -9 and so the probability...