If you roll two number cubes what is the probability of their sum being seven or higher

Sum of 7 = (6/6) (1/6) = 1/6

sum of 8 = (5/6) (1/6) = 5/36

sum of 9 = (2/3) (1/6) = 2/18

sum of 10 = (1/2) (1/6) = 1/12

sum of 11 = (1/3) (1/6) = 1/18

sum of 12 = (1/6) (1/6) = 1/36

(6+5+4+3+2+1) / 36

21/36

7/12 (58 1/3%)