Which describes selectivity?

1. the overall impression of excellence or quality of a school
2. a certain standard of excellence that professors and administrators expect of their students
3. the percentage of students who are admitted out of the number of students who applied
4. the amount of money your employer will compensate you during your first days, weeks, or months of employment

3. the percentage of students who are admitted out of the number of students who applied

This option describes selectivity in the context of college or university admissions. A school that admits a low percentage of its applicants is considered to be more selective.