Your expectation is to lose 12 cents
Broken down by each come out roll:
2: frequency = 2.78%, result = +5.00, 5.00*2.78% = +0.14
3: frequency = 5.56%, result = +5.00, 5.00*5.56% = +0.28
4: frequency = 8.33%, chance of making=3/9=33.33%, result = +5.00,
8.33*33.33%*5.00 = +0.14
5: frequency = 8.70%, chance of making=4/10=40.00%, result = +2.50, 8.70*40.00%*2.50 = +0.09
6: frequency = 10.87%, chance of making=5/11=45.45%, result = +1.00, 10.87%*45.45%*1.00 = +0.05
7: frequency = 10.71%, result = -5.00, 10.71%*-5.00 = -0.54
8: frequency = 10.87%, chance of making=5/11=45.45%, result = +1.00, 10.87%*45.45%*1.00 = +0.05
9: frequency = 8.70%, chance of making=4/10=40.00%, result = +2.50, 8.70*40.00%*2.50 = +0.09
10: frequency = 8.33%, chance of making=3/9=33.33%, result = +5.00,
8.33*33.33%*5.00 = +0.14
11: frequency = 5.56%, result = -5.00, 5.56%*-5.00 = -0.28
12: frequency = 2.78%, result = -10.00, 2.78%*-10.00 = -0.28
Add them up and you get -0.12.
Mistakes you made:
7,11,12 loses 5 dollars
12 loses $10 because the don't pass bet pushes.
your making ... $3 on 5,9
5,9 pay 3/2, so make only $2.50.
Other comments:
also a very avid blackjack player, just wanted to know what people thought about this crap system
Your system wins/loses/pushes 30.7%/19.1%/50.2% of the time, so it seems you're winning more than you're losing.
If you flat bet $5 on the pass and the come bet, you expect to lose only 7 cents, and I think you will have as much fun.
Be careful on this board; the locals tend to be proficient in Math, but very deficient in manners. Posting losing system often results in less than polite responses.