The image of Faldage as a callow yoot in another thread prompted me to ask about something that's been bugging me.

My local grocer has emblazoned their bags with anti-violence statistics, including this:

80% of violent crimes are committed by youth ages 14-24 years old.

First, that word "youth" throws me for a loop; it looks like it should be "youths", but somehow that doesn't sound right either as Fred Gwynne would surely tell you

Second, isn't "ages 14-24 years old" redundant?

This is a huge national chain, so i can't imagine they'd have two glaring errors... am i wrong?