To generate the 2x and 3x multipliers that Ron cashed his dealt royal flush on, it would be helpful to know what the dealt hand was on Ron's previous spin before the dealt royal flush spin. To generate the 2x multiplier, the
ending hand of the spin before the dealt royal flush spin, would need to be a jacks or better pair, quads not consisting of rank 5 to King (kicker or not), a straight flush or a royal flush. To generate the 3x multiplier, the ending hand of the spin before the dealt royal flush spin would need to be two pair or quads of rank 5 to King. So there are a very large number of possibilities of what Ron was dealt on the spin before the dealt royal flush spin, that could generate a 2x and a 3x multiplier. The question then is what is the probability of getting
exactly one 3X multiplier and exactly one 2x multiplier on the previous spin. I'm not interesting in going through the combinatorics of all the dealt hands that could lead to the 2x and 3x multiplier that two of Ron's five dealt Royals were used on. BTW, it is not at least one 2x and not a least one 3x multiplier, but exactly one of each, so the odds are a lot longer than 5x on the shot as you defined it. Also pat hands have nothing to do with the calculation of the probability of this shot,
only the ending hand. If you get dealt a pair of jacks plus rags, you are holding the jacks. If they don't improve you get a 2x multiplier otherwise it could be a better multiplier available for the next spin. But many many other holds (for example you hold an Ace and get another Ace plus rags) besides a pair of jacks could get you a 2x multiplier to be cashed in on by one of Ron's royal flushes on the ensuing deal - again I am not going to go through all of the possible holds that could generate these multipliers.
