Each branch of the U.S. military has its own minimum standards when it comes to the ASVAB scores and education levels needed to qualify for enlistment. The overall ASVAB score is known as the AFQT score, or Armed Forces Qualification Test score
Recruits for the Air Force must score at least 36 points on the ASVAB. Some, but VERY few, exceptions can be made for a small group of high school graduates who score as low as 31. The majority of those accepted for an Air Force enlistment, 70 percent, achieve a score of 50 or above.
Your chances of joining the Air Force without graduating from high school are very slim. Less than one percent of all Air Force enlistments each year are GED-holders. To even be considered for one of these few slots, a GED-holder must score a minimum of 65 on the AFQT.
The Air Force does allow a higher enlistment rank for recruits with college credit.
The Army requires a minimum AFQT Score of 31 for enlistment. To qualify for certain enlistment incentives, such as enlistment bonuses, an Army recruit must score a minimum of 50.
The Army allows more recruits to enlist with a GED than any other branch. The Army even has a special program, called Army Prep School, that allows individuals to enlist who have no high school diploma or GED.
The Army also offers a higher enlistment rank for recruits with college experience. For those with a bachelor's degree starting rank is an E-4.
Marine Corps recruits must score at least 32 on the ASVAB. Very few exceptions are made for some otherwise qualified recruits with scores as low as 25.
The Marine Corps limits GED enlistments to no more than five percent per year. Those with a GED must score a minimum of 50 on the AFQT to even be considered.
The Marine Corps offers advanced enlistment rank for college credits. However, the Marines are the most restrictive of all of the branches in this area. The maximum advanced rank for college credits is E-2, where the other services will give college credit advanced rank up to E-3 (E-4 in the Army).
Navy recruits must score at least 35 on the AFQT. Reserve enlistment programs only require a score of 31. The Navy accepts very few recruits who don't have a high school diploma.
To be considered for enlistment with a GED, you must score a minimum of 50 on the AFQT. You must also have no drug use on your record, and at least three references from influential members of the community. Any police involvement, other than minor traffic offenses will also disqualify a GED applicant.
Like the other services, the Navy offers advanced enlistment rank (up to E-3) for college experience.
The Coast Guard requires a minimum of 40 points on the AFQT. As with the Air Force, those without a high school education are generally ineligible. Very few recruits will be allowed to enlist with a GED score of less than the minimum AFQT score of 50.
The Coast Guard offers advanced enlistment rank of E-2 for 30 college credits, and E-3 for 60 credits.
Please also refer to the attached link - https://www.petersons.com/blog/what-your-asvab-scores-mean