We roll two fair dice. what is the probability that at least one die shows a three, given that the sum of the dice is 4?

You have three choices if the sum of the dice is four. 1- the first die is 3, and the second is 1. 2 - the first die is 1, and the second is 3. 3 - Both die are 2. Therefore, 2/3 of your choices give you one die that equals three, and that gives you your probability.

put like terms together.orremember that the 45 becomes negative when moved to the other side.orthe minuses cancel out.