I'd like to know how "the 20 to 30 year old age group" is punctuated in standard English. "30-year-old" should be hyphenated. What about "20 to 30"?
Any principles at work?
I'd appreciate your help.
English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. It only takes a minute to sign up.Sign up to join this community