A generic noun represents a typical member or members of a group, such as a typical student or typical musicians, or any member of a group, such as any lawyer. Although singular generic nouns may seem to have plural meanings, they must be treated as singular.
When a plural pronoun refers mistakenly to a generic noun, you will usually have three revision options.
Exercise: Pronoun-antecedent agreement 1
Exercise: Pronoun-antecedent agreement 2