Question

what is meant by
Proper subset and universal set.​

Answer 1

ÊLLØ'.....!!

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→Proper subset:

•If all the elements of the set A are in the set B and set B contains at least one element which is not in A , we say that A is proper subset of B.

→Universal set:

•A set X is said to be Universal set, if all the sets under consideration are subsets of the set X.

•The universal set is Sometimes denoted by U.

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THÅÑKẞ....!!

Answer 2

Proper subset
Is a subset that contain all the elements of the superset , but the superset contain at least one element not present in the subset .

Universel set
The set containing all objects or elements and of which all other sets are subset