Randomly k distinguishable balls are placed into n


Question: 1. Randomly, k distinguishable balls are placed into n distinguishable boxes, with all possibilities equally likely. Find the expected number of empty boxes.

2. You have a well-shuffled 52-card deck. On average, how many pairs of adjacent cards are there such that both cards are red?

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Basic Statistics: Randomly k distinguishable balls are placed into n
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