Noun are often dropped after determiners if the meaning is clear. Do you Know Tom’s book?. I haven’t read any. Have you got any tomatoes? A few. Which color hair do you want? This will do. Determiners are sometime use without noun to refer to people in general. This is formal and generally rather old – fashioned. Many are called but a few are chosen. Some say one thing. Some say another. Possessives ( except whose, and his have different form when they are used without noun – mine, yours, hers, ours, theirs, - Compare that’s my coat – that’s mine.