One fine afternoon an elderly gentleman tries to get into his local betting office. Much to his surprise, the door is locked. After a few more futile attempts at opening the door a man sticks his head out of a window. It turns out to be the bookmaker himself :
- Sorry, but we're closed today!
The elderly gentleman promptly replies: - But there's a sign on the door saying : Open : 9 - 4, and it's only half past eleven!
to which the bookmaker says: - But those are not the opening hours; they are the odds that we're open today.
