A blond woman speaks with a group of young dark-haired female students carrying pieces of paper.
A blond speaks with a group of young dark-haired woman students carrying pieces of paper.
A blond woman is a blond and speaking dark-haired female students is the same as dark-haired woman students.
To say " a blond " implies that the person is a blond woman.
If they are female students, they are women.