Calculation regarding wait-list: Do they indicate no hope?

bs2
Sat, 29 Apr 2006 03:25:26 +0000

Brown University (Class of 2010)

Total candidates Accepted = 2525
Accepted in ED = 545
Accepted in RD = 2525 - 545 = 1980

The ED ones will, of course, definitely enroll.

Total size of Class of 2010 = 1450
Enrolled through ED = 545
Enrollment required by Brown through RD = 1450 - 545 = 905.

This implies that even if Brown achieves a 45.71% yield, it’ll be able to fill its freshman class. And I read on CC that Brown has a yield of 59%.
So is it the end of the road for the wait-listed or have I missed something?