Question

What are subsets. Explain with an example.

Answer 1

In mathematics, especially in set theory, a set A is a subset of a set B, or equivalently B is a superset of A, if A is "contained" inside B, that is, all elements of A are also elements of B. A and B may coincide. The relationship of one set being a subset of another is called inclusion or sometimes containment.

Answer 2

Every element in first set is an element in second set. A={1,2,3} B={1,2,3,4} A is subset of B. A={1,2,3}B={1,2,3}, A is subset of B