Question

What do you mean by sets ???​

Answer 1

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Refer the attachment .

Answer 2

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Sets are basically an organized collection of objects. Sets can be either represented in roster form or set builder form. The objects that a set consists of are known as the elements of the set. These elements can be grouped to form subset of the original set. For e.g. if ‘a’ is an element of set A, this is represented as:

a ∈ A , where ∈ means “belongs to”

On the other hand if ‘b’ is not an element of A, we represent it as:

b ∉ A, where ∉ means “doesn’t belong to”