Are Durmstrang and Beauxbatons single-sex Wizarding Schools?
I don’t recall the book itself ever saying so, but I also don’t recall mention-by-name of any female Durmstrang student or male Beauxbatons student, and in the trailer linked above Dumbledore says something like “Welcome the gentlemen from Durmstrang and the ladies from Beauxbatons”, and sure enough the contingents lined up from each school look single-sex in the brief frame in which they are shown.
