Roughly 70% of applicants who apply to San Francisco State are accepted. This large public university is a member of the California State University System, and decent grades and test scores are a must for admission. The green and blue data points in the above graph represent accepted students. The majority of successful applicants had "B" averages or higher, SAT scores (CR+M+W) of 1350 or higher, and ACT scores of 18 or higher. You'll see that a few students with lower grades and scores were accepted, but there are also some red data points (rejected students) in the middle of the graph. Some students with grades and test scores that seem to be on target for San Francisco State will still get rejected.
Unlike the University of California System, the California State University admission process is not holistic. Except for EOP students, applicants do not need to submit letters of recommendation or an application essay, and extracurricular involvement is not part of the standard application. Thus, the reason why an applicant with adequate scores and grades would be rejected tends to come down to a couple factors such as insufficient college preparatory classes or an incomplete application.
To learn more about San Francisco State, high school GPAs, SAT scores and ACT scores, these articles can help: