It's not a question of age, but marital status (Mrs/Miss). Ms can be used for any woman regardless of marital status.
When we don't know about years old of woman, Do we have to use Mrs or Miss or Ms?
It's not a question of age, but marital status (Mrs/Miss). Ms can be used for any woman regardless of marital status.
Mrs: for women married
Miss: single
Ms: married or single