posted by Daniel on .
Dice is a popular game in gambling casinos. Two dice are tossed, and various amounts are paid according to the outcome. In a certain game, if a four or eleven occurs on the first roll, the player wins. What is the probability of winning on the first roll?
4 = 2+2 or 3+1 or 1+3 = 3/36
11 = 6+5 or 5+6 = 2/36
Either-or probability is found by adding the individual probabilities.