Final answer:
The marginal total in the table is 4,293. The relative frequency of females in the 35+ age group compared to the total number of students is 10.86%.
Step-by-step explanation:
The marginal total in the table is the total enrollment for the 25–34 age group, which is 4,293. This represents the sum of the number of males and females in that age group.
To find the relative frequency of females in the 35+ age group compared with the total number of students, you need to divide the number of females in the 35+ age group by the total number of students and multiply by 100 to express it as a percentage.
The number of females in the 35+ age group is 2,124, and the total number of students is 19,558. Therefore, the relative frequency of females in the 35+ age group is (2,124 / 19,558) x 100 = 10.86%.