Marquette played a game with her little brother Julio using the sum of two fair number cubes. She recorded how many times each sum came up in the chart below.
Which of the following statements is true if the theoretical probability of rolling a 7 is 1/6?
sum frequency
2 3
3 0
4 2
5 3
6 6
7 12
8 12
9 8
10 3
11 1
12 0