It depends on "rolling a sum of 1" with what. One die, two dice or more?
Chat with our AI personalities
The probability of not rolling a sum of six with two fair dice is 1 minus the probability of rolling a sum of six. There are 36 permutations of rolling two dice. Of these, five sum to six, 1+5, 2+4, 3+3, 4+2, and 5+1. The probability, then of rolling a sum of six is 5 in 36. The probability, then of not rolling a sum of six is 31 in 36, or about 0.8611.
The probability is 4/36 = 1/9
36
1 in 9
It is 1/12.