Answer:
The Science set, designed and produced by Dext Technologies, is a syllabus compliant, portable, highly scalable science laboratory designed to fit in the bags and on the desks of students. It comes with 45 individual component and materials the science set can be used to perform experiments in.
examples:
set of all computers in the world, the set of all apples on a tree, and the set of all irrational numbers between 0 and 1.