# Probability Chapter 2

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Set Operations: Before we move further into Probability. Let us try to understand Set Operations briefly.

Set is an unordered collection of objects, known as elements or members of the set. An element ‘a’ belong to a set A can be written as ‘a ∈ A’, ‘a ∉ A’ denotes that a is not an element of the set A.

Basic Set Operations:

Union of two Sets: Union of the sets A and B, denoted by A ∪ B, is the set of distinct element belongs to set A or set B, or both.

Intersection of two Sets: Intersection of the sets A and B, denoted by A ∩ B, is the set of elements belongs to both A and B i.e. set of common element in A and B.

Independent Sets: Two sets are said to be independent or disjoint if their intersection is the empty set .i.e. sets have no common elements.