That's because there's a ridiculously high probabilty of it happening! Strewth, I'm sure I worked this out last season because people always go "Oh fancy that, one of three teams playing one of another four teams, who'd have thought it!?" It's like an over 50% chance of happening.
Very very roughly:
Let's say (A) is a relegated team drawing a top 4 team, and (B) is them not (and assume for now they don't draw one another).
First relegated team draws: (A) is 20% (or so), (B) is 80%. Simple enough right?
But for the second, the 25% of (A) only matters if you get (B) for the first. so really, it's 25% of 80 (20). Which means the probably of (A) for either 1 or 2 is 40%.
Same for the third. 25% of 60% is 15.
20 + 20 + 15 = 55%
The long method of doing it involves actually working out (A1) OR (A2) OR (A3) (I think), but I can't remember offhand how to do that.
No, it's a 55% chance when you combine them all together. You're only interested in the 3rd outcome if the two before have already failed to produce the result you wanted! So it's not a completely independent 25%.
*Smacks head*
If one of the other 2 have drawn a top 4 side you don't care because ONE OF THE OTHER TWO HAS DRAWN A TOP 4 SIDE.
**** me the football season is months away and we already have people arguing, grow a pair