Another blackjack question.?

Question

I have played 21 plus 3. Some say the side bet is a sucker bet. I am a beginner but it seems I did well when playing the plus 3 (flush or straight my hand and dealer up card). It pays 9 to 1. It is my opinion, though new at playing, that I hit more often when there were fewer players at the table. Any ideas?

Answer 1

Yes definatley a sucker bet

Probablbilty of a flush = 5.177%

Probability of a striaght = 3.475%



That is  an 8.652% chance.

So if you bet one dollar you EV is  (-1* 0.91348) + (9* 0.08652) = -0.1348

So you expect to lose 0.1348 dollar per dollaryou spend in the long run.

Which is a fairly large house edge