Say you have a container filled with a million marbles. You cannot see the marbles.
You reach into the container and pull out one marble at random. It is black.
According to ID Creationist probability calculations, the odds of your picking a black marble (and not one of another colour) are 1 in a million.
The reasoning: There were 1 million possible marbles you could have drawn. But you drew only one. And it was black. Therefore, 1/1 million.