Everything is luck man, no math no shit
Most of them depends upon your luck and only lucky people get those jackpot. Few games do exists where you require a good experience and skills to win those gambling else like roulette, computer slot machines etc are the luck based games.
Yeah, those who are lucky can win the game but not all the time. In using skills and strategy its a smart move to win in a game that is a perfect for peer to peer opponent and regarding about maths i know computer and how the games with numbers was programmed and it will help the gambling owner to set up and not the players