Designates a bet, with which two different events, also from different sport bets, are combined to a bet. The double is considered only as won, if all exits of the combination were typed correctly. The ratio of a double is calculated by multiplication of the single ratios. Example: 10 euro employment on victories by Bavaria Munich against Hamburg sports association (ratio 1.5) and MSV Duisburg against Werder Bremen (ratio 2.5). The ratio of the double reads 1.5 x 2.5 = 3,75. With 10 euro investment is to be expected a profit 10 x 3.75 = 37.5 euro and a clear profit of 27,50 euro