There were 51 6-8 Quinielas, 40 of which were the 8-6 variety.
That'a about one every 4-1/2 performances. There was no statistical
difference between the 8-6 and 6-8 payoff amounts but, then again,
why should there be?
The payoff average was about $69, which means that, overall, the
bet returned 55 cents per dollar wagered.