Nathan has two six-sides dice, one red and one blue, numbered 1 to 6. What is the probability that he will roll a sum of 7?

Answer 1

7 = 1+6 = 2+5 = 3+4 = 4+3 + 5+2 = 6 + 1
six ways
how many possible ways?
6 * 6 = 36
6/36 = 1/6 = 0.167 = 16.7 percent