Once you get into the realm of having four selections as part of your bet you either lean towards a 4 fold accumulator (all results have to come in aka win), a yankee (you’re less certain of four wins so expand to 6 doubles, 4 trebles and 1 four-fold to try to make a profit even if you don’t get four wins) or this, a Lucky 15 where you expand on the yankee format and include all four of the single bets as part of your over all wager. As such your bet consists of 4 singles, 6 doubles, 4 trebles and 1 four-fold.
With a lucky 15, you’re not dead set on all four of your selections winning, but instead hold a more realistic / pessimistic view that in all likelihood one or two will fall short. With a lucky 15 bet, you’re placing more bets and as such spending more on various combinations of outcome, but at the same time, it’s not an all or nothing, win or lose, endevour. Most bookmakers offer this kind of bet so it’s worth a try if you like to mi things up once in a while.
I’ve never actually caught up with someone in the bookies and asked them what they’re planning on betting on, only for them to grab my arm and say “I really have to get this patent on, right now!”. From that I can perhaps deduce that it’s not a bet that the average punter does on a day to day basis. However, it’s of course an option and where you have three selections that you’re ‘reasonably’ confident of, it’s certainly not a bad option to go for.