There are two of them.
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48 cards. In double Pinochle (the only kind I have ever played), you use two Pinochle decks, and take out all the 9s. The relative rank of the cards is switched from most card games somewhat as well... A is still high, but then 10 comes next, followed by K, Q, and J (and then 9 if you use it).
Nine of them
79
Eleven.
20