The faces of an octahedral die are labeled with digits 1 through 8. What is the probability, expressed as a common fraction, of rolling a sum of 15 with a pair of such octahedral dice?
Answer is 1/32
numbers through 1 and 8 that can add up to 15: 7 and 8 OR 8 and 7, meaning there are 2 possibilities for a sum of 15
8*8=64 total possibilities
