Odds

So what are the odds that you'll run into a friend, on more of a whim rather than planned, and you'll find that they are reading the exact same book as you?

What are the odds that, when asked where they are in the book, they'll be in exactly the same part of the book as you?

And what are the odds, when wanting to know exactly what page they're on because this is just too much of a coincidence, that you'd both be on the exact same page?