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N cards are labeled with the number {1,2,3,...,N}. After shuffling, the cards are placed from left to right at positions that are labeled from 1
N cards are labeled with the number {1,2,3,...,N}. After shuffling, the cards are placed from left to right at positions that are labeled from 1 to N. A card is said to be placed correctly if its number is less than the number of its position. Let the random variable X denote the number of cards that are placed correctly. Find E(X).
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