Okay, there is a lot of debates about the answer to this question in class. Most of the proposed solutions are plausible, but I'm not going to list them because I don't want to give ideas.
But here is the question:
If you have two randomly shuffled deck of cards of 52 cards per deck, and put both decks side by side.... then you flip the 1st cards from both decks and compare them, and you do the same for the 2nd, 3rd, and subsequent cards in the deck until you compare all the cards.... what is the probability that there is at least 1 EXACT match out of 52?
What do you think is the answer? And why? THanks