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[Harry Potter] Do all 4 houses have an equal amount of students? If not, how large are they when compared to each other

From what I gathered from the films, all 4 houses are fairly equal, but that doesn't make sense because those who are particularly brave go to Griffindor, the clever to Ravenclaw, the evil/ambitious go to Slytherin and everyone else goes to Hufflepuff. Shouldn't hufflepuff be the largest house then?
gpt
They're roughly equal. The traits that the houses represent are general rules, but not hard and fast. Hermione would have been a Ravenclaw if the hat were judging by simple measurements like 'clever' vs. 'brave.' So what the hat is really looking at is more of an evaluation of who they are as a whole, where they'd fit best, benefit the most, and what the hat thinks they'll become. 

Also, Hufflepuff isn't defined by being 'the remainders' they're defined by being hardworking. Cedric Diggory was clever and brave, but he was also a hard worker, and a better wizard than Harry Potter (just lacked in Harry's plot armor..)