Question

What is difference between collection and set What is difference between collection and a set

Answer 1

Dear Student,
The viewpoint about a "collection" is simply a notion that is thought to be a group of mathematical objects which are collected into one big pile. Collection need not to be well defined. Also, Elements can be repeated in a collection of elements.
On the other hand,
Set is a well defined collection of elements which means that Set itself is a collection but It's well defined. Also, Elements cannot be repeated in a set.

Regards,