@michael e sullivan

You are right, my mistake. I was assuming that running, say, 100 trials meant going all the way through a 100-card deck without shuffling. Going back over the description of the problem, I don't see where it explicitly says that the cards are replaced and reshuffled, but that's probably a more meaningful experiment to run, and I'm sure that's how they did it.

At least I'm not crazy (nor, hopefully, stupid, if only 30%). :)

@A Pickup Artist

No worries, I made a bad assumption.