It is totally impossible that you win gambling without any lose. any person who go to the field of gambling have to remember that there are 50% chances of lose and 50% chances of winning the game.
Its fact we have very less chance without lost but some time peoples lucky enough to win big prizes in lotteries without lost any thing as this happen to my friend he bought a lottery worth of 10 USD and this give him nearly 100000 USD prize which change his life