If AROTC is like AFROTC, they will use the will use the same score chart that's used for active duty members. Just google Army APFT score chart (or AF PFA score chart if your AFROTC) to get the max and minimums. Generally, the maximums when applying for the scholarship are a bit lower than the ones you go by in ROTC (Ex: female push-up max for applying for an AFROTC scholarship was 42 in a min, but max while in AFROTC and big AF is 47 in a min).
So if your DS shoots for big ARMY maximums, then he'll either meet or exceed AROTC standards.
http://usarmybasic.com/army-physical-fitness/apft-standards
This link doesn't have the best format, but it has the info you were looking for. Male maximums: 71-pushups, 78-situps (each in 2 min), 13:00min- 2 mile run