Number of pupils at Hogwarts ?miscalculation?

[Joanne0012 at aol.com]

No: HPFGUIDX 30300

radius_squared at h... wrote:
> > 
> > Here is a mistake concerning the books that no one has picked up on
> > yet. Let's say there were 200 people in each house. That means about
> > 86 people per year. Half of those would be boys, so about 43 boys per
> > year per house. When Harry mentions his "dorm," there are at most 7 or
> > eight boys in his year, while, according to statistics, there should
> > be at least 40. Did I make a stupid mistake and miss something, or
> > have I made a point?

Well, for starters, 200 divided by 7 (years) is 28, not 86 . . . 

Where did you get the 200 in the first place?