Doubles (3 Comb) is a multiple bet of 3 selections arranged into two combinations.
It means if you have like 3 events on 1 bet slip, the system would pick any 2 of the 3 events in 3 different selections.
To place a double 3 combo, once you select the 3 events you will click on the drop down arrow on the bet slip to change bet slip to multiples then input your stake on doubles.
In doubles 3 (Comb), matches A, B and C would be on your bet slip but the stakes will be calculated individually for each combination. So, if you enter N100 in the stake box, your total stake will be N300 meaning you will be charged N300 if you proceed with that bet.
This is because you are placing a doubles (3 Comb) bet and your total stake will be calculated at N100 for each of 3 combinations.
Unlike the normal accumulator, you don't have to win all the bets on the bet slip to get returns.
You need to get at least 2 selsctions correctly to get a return.