"age mix" is correct and can be used in written English.
For example, a kindergarten classroom may have an age mix of 3- to 5-year-olds.
There's also a great age mix on those Sunday morning rides.
In short, the age mix of the world is turning upside down and at unprecedented rates.
Although before intervention rural children were familiar with each other neither this nor age mix affected outcomes.
THE CROWD Neat and casually attired diners in a diverse age mix: young couples, office groups, seniors.
Which means we're probably well into April before we have a great sense of the age mix in this year's enrollment.
Hundreds of chairs have been cleared for a sedate mosh pit of carefully screened fans cast to achieve the proper age mix of 18 to 25. Pulsing lights -- colored like giant Life Saver candies -- have been attached to balconies to create the dizzying effect of an outsize electric pinball machine.
Now at Stanford University, formerly at Harvard, Mr Lessig has become a rock star of the information age, mixing scholarly inquiry with barnstorming activism on many issues.
The plausibility of different age mixing models is tested by comparing observed temporal variations in age with those simulated using simple numerical models, and by examining plots comparing the concentrations of different age tracers.
I will return later to the issue of age mixing.
Age mixing benefits the older children as well as the younger.
Age mixing allows younger children to play at and learn from activities that they could not do alone.
