This card talk made me think of blackjack.
quote:
You can get a blackjack in a single deck game one for every 20.72 hands dealt. A double deck will give you a blackjack for every one in every 20.93 hands. A four-deck game gives one for every 21.02 hands. And the numbers go up as you increase the number of decks.
Single Deck vs. Multiple Deck Blackjack Games
I think that we're talking about using each of those billion decks of cards to deal a billion hands and the probability that at least one of those billion hands being a royal flush.
Multiple decks in your scenario would be to your advantage, you probably couldn't loose with numbers that large.
I thought the same as you though, that depending on how you deal it, then it could go either way.
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