How many ways can you arrange a deck of cards? - Yannay Khaikin

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One deck. Fifty-two cards. How many arrangements? Let's put it this way: Any time you pick up a well shuffled deck, you are almost certainly holding an arrangement of cards that has never before existed and might not exist again. Yannay Khaikin explains how factorials allow us to pinpoint the exact (very large) number of permutations in a standard deck of cards.
Lesson by Yannay Khaikin, animation by The Moving Company Animation Studio.