11/12
Probability is the likelihood or chance that an event will occur.
Probability = Expected outcome/Total outcome
If a 12-sided die is rolled, the total outcome will be 12
Pr (getting a number 8) = 1/12
Pr(getting a number other than 8) = 1 - 1/12
Pr(getting a number other than 8) = 11/12
Hence the probability of getting a number other than 8 is 11/12
