Question

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

Answer 1

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%)