The correct answer for the given statement above would be TRUE. It is true that you can use a tree diagram to calculate the probability that the sum of the dice is an even number. In math, a tree diagram is used to see all the possible outcomes of a certain event and its probability. A way that you can use a tree diagram for this is like this: list all possibilities from 1 to 6. For each of these, list all possibilities from 1 to 6. This gives you 36 branches at lower level. Hope this answer helps.