What 20-to-1 means: When you see 20-to-1 odds, you're looking at a long shot that is unlikely to win. In fact, the implied win probability for a team that's 20-to-1 is 4.76%. However, should that long shot come in, it would pay out $20 for every $1 wagered.
A Lucky 15 consists of 15 bets of equal value made on four distinct events. The bet includes four singles, six doubles, four trebles and a fourfold accumulator.