16 Three cards, A, B and C are marked with the numbers 2, 3 and 4 respectively. One card is chosen, at random. A second card is then chosen, at random, from the remaining two cards. The sum of the numbers on the two chosen cards is calculated. (a) What is the probability that the sum is 3? (b) Complete the table to show all the possible outcomes. You may not need all the columns. (c) What is the probability that the sum is 7?