The combination of two sets is the Union of the sets and contains all the elements of both sets.
That is called the UNION of the two sets.
Two sets are said to be equal when all the elements present in the first set are there in the second set and vice-versa! It even applies for more than two sets. -19yoIndianLad
Two sets are said to be equal when all the elements in the two sets are same
The union of a collection of sets is defined as the set of all distinct elements that are in the collection. This includes the specific case where the collection consists of two sets.
A union of two sets is the set that contains all the elements that are in any of the original sets.
The intersection of two sets S and T is the set of all elements that belong to both S and T.
The union of two sets A and B is a set that consists of all elements which are either in A, or in B or in both.
Two sets are equal when they have the same elements.
The difference of two sets A and B , to be denoted by A-B, is the set of all those elements which belong to A but not to B