What are the odds of this happening?

[skitzo444]

I was wondering if people ever attempted to calculate the odds of a concidence happening. I went to the Lizzie Borden murder house on vacation and the next day My girlfriends mom read a random question out of a trivia book with 5000 questions and the question asked about the lizzie borden house murder.
What are the odds of going to a place and then having someone who has not clue about it open a book with 5000 questions and randomly pick the one about the place you went to the day before!?