@Greymeer The 13% is for all holistic review applicant admissions to A&M, not just engineering.
60% of admissions to the university are top 10% applicants. Another 10% comes from Academic admits. 30% of holistic review applicants receive some form of admissions, 13% of which receive full admissions to the university while the other 27% are offered the pathway decisions.
In addition to the pathways for engineering, (Galveston and the Academies at Blinn Bryan and McAllen), all other majors can receive a pathway admissions decision of Blinn Team co enrollment or Gateway to Success, a summer provisional program.
For fall 2018, 4006 engineering first time in college students enrolled.College Station and Galveston https://dars.tamu.edu/Student/files/Apply-Admit-Enroll-Sum-All-Fa18-incl-Galveston.aspx
Fall 2017 3888 https://dars.tamu.edu/Student/files/Apply-Admit-Enroll-Sum-All-Fa17-incl-Galveston.aspx
Total applicants : 42,000
Top 10% admits: 11,205 applied and offered admissions
5639 top 10% enrolled
Holistic Review Applications: 27,000
Holistic review admits: 3800 offered admission
Academic admits: 4300 applied and offered admission
Blinn Team: 2400 offered admissions
Blinn Engineering: 855 offered admission
McAllen Engineering: 1200 offered admission
Galveston Engineering: 1200 offered admission
Gateway: 530 offered admission
PSA: (Program for System Admissions) 10,600