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Please help me with this review question and show all steps. Thanks! N cards are labeled with the numbers {1, 2, ..., N}. After shuffling,

Please help me with this review question and show all steps. Thanks!
N cards are labeled with the numbers {1, 2, ..., N}. After shuffling, the cards arc placed from left to right at positions that are also labeled from 1 to N. A card is said to be placed correctly if its number is less than or equal to the number of its position. Let the random variable X denote the number of cards that are placed correctly. Compute E(X)

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