Are You Shuffling Cards Incorrectly? In A Random Shuffle, How Many Cards Stay In Place?

You open a brand new deck of cards, which has cards in increasing order by suit. You give the deck a random shuffle. How many cards, on average, do you expect to be in the exact same position as before you shuffled the deck? The video presents a solution that many find to be counter-intuitive.

Blog post (text explanation): http://wp.me/p6aMk-4Cs

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