If you're rolling two dice, what is the probability that the sum of two dice is a 7?
36 combinations possible
How many add to 7?
1 - 6
2 - 5
3 - 4
.
.
.
6 - 1
diagonal if you make a matrix of it all
6 total
6/36 = 1/6
How many add to 7?
1 - 6
2 - 5
3 - 4
.
.
.
6 - 1
diagonal if you make a matrix of it all
6 total
6/36 = 1/6