Since the amount of the prize pool is directly correlated with the quantity of tickets sold, the likelihood of winning varies from event to event. Since half of the proceeds will be given to the winner, the odds of winreal money slots usaning are typically determined by dividing the number of tickets sold by two. Understanding the Odds. The odds of winning, for instance, would be 1 in 500 if 1,000 tickets were sold. There is no surefire way to win the 50/50 lottery, so it's vital to remember that your chances of winning are entirely dependent on chance. There is complete randomness in the outcome, with an equal chance of drawing the winning ticket for each ticket.