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Any activity that combines two or more sets in some defined way to form a new set is referred to as an operation of a set. We could indeed deduce from this that we can combine sets in a variety of ways to create new ones. To carry out any operation, we require specific tools and techniques, as well as problem-solving abilities. Aside from union and intersection, another important technique in the field of sepsis is determining the Set’s Complement.

- A set A’s complement has been defined as the difference between the universal set and set A.
- To comprehend complement, we must first comprehend the concept of a universal set. We understand that a set is a collection of distinct objects represented by elements enclosed by curly brackets ‘{}’. We addressed various types, such as a subset, null set, superset, finite and infinite set, and so on. Such a variety of sets represents meaningful data, such as books in a library, addresses of various buildings, the location of stars in our galaxy, and so on.
- As previously stated, a complement of the set is the distinction between the universal set and the set itself. We’ve already covered the concept of a universal set in previous lessons, but to summarise, a universal set is a fundamental set for which all other sets are subsets. It really is represented by the letter U.
- Now we’ve reviewed the universal set briefly, we’ll move on to the next task: determining the complement of a set. The difference between two sets, A and B, contains all of the elements in set A that are not in set B. It’s written A – B.
- For instance, set A could be defined as {5, 7, 9} and set B could be defined as {2, 4, 5, 7}. The difference between sets A and B is then written as:
- A – B = {9}
- Likewise, B – A would be:
- B – A = {2, 4}

**Notation of the Complement of a Set**

Assume we have set A, which is a subset of set U, which is also known as the universal set. The complement of a set A, in mathematical terms, is:

**A’ = U – A **

A’ would be the mathematical representation of A’s complement. U is indeed the previously discussed universal set. A’ could now be defined as the difference between the universal set and set A, such that it includes all of the universal set’s elements or objects that are not present in A.

**Venn Diagram Representation**

- A Venn diagram is a graphical tool that uses overlapping circles to illustrate the relationships between different sets of data. In a Venn diagram, the circles represent different sets, and the area where the circles intersect represents the overlap between the sets.
- A Venn diagram can be used to illustrate the relationship between two sets, as well as the relationship between three or more sets. For example, a Venn diagram could be used to illustrate the relationship between the sets of students in a classroom, the sets of students who are eligible for a scholarship, and the sets of students who have applied for a scholarship.
- A Venn diagram can also be used to illustrate the relationship between two different concepts. For example, a Venn diagram could be used to illustrate the relationship between the concepts of “math” and “science.”
- A Venn diagram’s region has been represented as a set, and the elements are represented as points within this region. Such a method of representation allows us to comprehend the operation as a whole.

**FAQs**

##### What is a complement of two sets?

The union of two sets includes every one of the elements in both sets (or both sets). A set A's complement incorporates everything that isn't in set A.

##### How do you find (AUB)'?

The number of attributes in A union B can be calculated by counting the elements in A and B and taking the common elements only once. The number of items in A union B is calculated as n(A U B) = n(A) + n(B) - n(A B).