Probability is the chance that given event will occur. It is expressed as a number between 0 and 1 (where 0 shows false and 1 shows true). The higher the. Note: This calculation assumes that only one of each possible number will appear in the "winning numbers." That is, a given number, say 10, can only appear. If you ever wondered what are your chances of winning a bet with odds 3 to 5, our odds calculator is here to help you. Having given the betting odds, you will. Our Approach Supporting Common Core State Standards. Sign In Don't have an account? Read our featured article. When playing a lottery or other games of chance be sure you understand the odds or probability that is reported by the game organizer. What is the highest number you can choose? I'm curious on BetSafe!