Hunter has 673 full-time and 886 part-time faculty members, and 20,844 students—15,718 undergraduates and 5,126 graduates. Over 50% of Hunters students belong to ethnic minority groups. The class of 2011 represents 60 countries and speaks 59 different languages. Seventy-one percent of these students were born outside the United States or have at least one foreign-born parent. SAT and high school GPA scores for the entering Fall 2012 class of freshmen have an SAT score 25th–75th percentile range of 1090 to 1280, meaning that 75% of students scored higher than 1090 on the SAT and 25% received a score higher than 1280. And high school GPA 25th–75th percentile range of 85% to 92%, meaning that 75% of students had an average high school GPA higher than an 85%  and 25% had a high school GPA higher than 92%.
Question: Which was the smallest group at Hunter, 20,844 students or 15,718  undergraduates?
Answer: undergraduates