In the song ''The Ballad of the Green Beret'',there is a line which goes,'100 men will test today,only 3 will win The Green Beret',is that statement correct?,and if not what is the the acceptance rate?

The Army's grueling Special Forces Assessment and Selection (SFAS) has a historical attrition rate that hovers around 70 percent--with another 10-15 percent lost in the ensuing Special Forces Qualification Course. This is not attrition for attrition's sake; in fact, Special Forces candidates are not harassed, hazed, or otherwise coerced into quitting at any time. Rather, the physical and mental rigors of the training cull out those who do not possess the necessary attributes for service in SOF. The end result is a soldier who is tough, self-reliant, innovative, and flexible.

http://www.baseops.net/militarybooks/specops.html


100-70=30. 30-3=27

About 27% win the Green Beret per this reference and my math.

Reading the reference, it is not clear whether that last 10-15% refers to the initial intake or the survivors of the first test. If the former then the final pass rate is 15-20%.