SOLUTION: find probability of the sum 8 appears in a single toss of a pair of fair dice.

The full space of events is the set of all pairs  (i,j), where i and j are integer numbers from 1 to 6, inclusively.

This space consists of  6*6 = 36 elements, and each element/event has the probability of  .


Of them, there are 5 outcomes where the sum is 8. They are


    (2,6), (3,5), (4,4), (5,3), (6,2).


Hence, the probability under the question is  .    ANSWER