13.26 NCAA rules for athletes. The National Collegiate Athletic Association (NCAA) requires Division II athletes to get a combined score of at least 820 on the Mathematics and Critical Reading sections of the SAT exam in order to compete in their first college year. In 2014, the combined scores of the millions of college-bound seniors taking the SATs were approximately Normal with mean 1010 and standard deviation approximately 218. What percentage of all college-bound seniors had scores less than 820?