Dice Is a Popular Game in Gambling Casinos

Short Answer

Dice is a popular game in gambling casinos. Two dice are tossed, and various amounts are paid according to the outcome. If a seven or eleven occurs on the first roll, the player wins. If a player tosses a pair of ones (called snake eyes ) on the first roll, the player loses. What is the probability of winning on the first roll?
Give your answer as a fraction.