For the totality of a definite plural group, جَمِيْعٌ can also be used as mudaf:
كُلُّ الطُّلَّابِ — all the students.
جَمِيْعُ الطُّلَّابِ — all the students.
This equivalence is limited to the meaning shown here. It does not erase the distinct “every” and “whole” readings of كُلٌّ.