Sarah rolls 2 fair dice and adds the results from each. Work out the probability of getting a total

Sarah rolls 2 fair dice and adds the results from each. Work out the probability of getting a total that is a factor of 6.

Factors of 6 are {6, 12}
P(Roll a 6) = 5/36
P(Roll a 12) = 1/36

P(Roll a 6 or Roll a 12) = P(Roll a 6) + P(Roll a 12)
P(Roll a 6 or Roll a 12) = 5/36 + 1/36
P(Roll a 6 or Roll a 12) = 6/36

Using our fraction simplifier, we see that:
P(Roll a 6 or Roll a 12) = 1/6