So we want the first one to be 1 and the second one to be 2. There is only 1 way to do that. In total there are ways to choose the first card and to choose the second card. So the probability is

Just label all the ways this can happen:b) The numbers on the two tickets are consecutive integers, meaning the first number drawn is one less than the second number drawn.

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As you can see there are ways of doing this so probability is:

Let be this probability. And let be the probability of getting a first number larger than the second. So is the same thing as except the roles of 1st and 2nd cards are reversed. Hence, . But as you know oppositive probabilities always sum to 1. Since are opposite (meaning anything you chose has to be one of the other) it means . That means .c) The second number drawn is bigger than the first number drawn.