Single
A Single is one bet on one selection. Your selection must be successful to have a return.
Example:
Arsenal (1/2) v Liverpool (3/1) match
You select Arsenal to win the match, you bet 10. Arsenal beats Liverpool 2:0. You have won 15. Your net profit is 5.
Double
A Double is one bet on two selections in different events. Both selections must be successful to have a return
Example:
Arsenal (1/2) v Liverpool (3/1) match
Tottenham (6/1) v Man United (1/2) match
First, you select Arsenal to win the match. Second, you select Tottenham to win the match. There will be two selections on your betslip. You bet 10. Arsenal beats Liverpool 2:0. Tottenham beats Man United 1:0. You have won 105. Your stake x Arsenal odds x Tottenham odds = 10 x 1.5 x 7 = 105