2 people each shuffle a deck of 52 playing cards thoroughly.
What is the probabilty of both decks being in the EXACT same order after shuffling?
Since there are 52 cards, these can be shuffled in precisely 52! ways.
Both the decks are in precisely same order after the shuffling in precisely one way.
Thus, the required probability is 1/52! = 1.24*10^(-68)
Edited on August 20, 2007, 1:02 pm