The odds of a random selection occurring in sequential order decrease relative to the number of possible items to choose from.
If you only have two items, then there's a 50/50 chance that a random selection will match a sequential selection.
If you have 3 items, then it's a 33% chance
A basic formula would be 100/ (number of items) %
The actual formula is quite a bit more complex, and I've got it someplace, just not sure where right now.
