If A and B are two sets such that A ⊂ B, then what is A ∪ B?

Solution:

A set is a well-defined collection of numbers, alphabets, objects, or any items.

A subset is a part of the set.

Set A is a subset of set B if all the elements in set A are present in set B.

Here,

A is called the subset, and B is called the superset.

If A and B are two sets such that A ⊂ B,

it means B consists all the elements of A.

Thus,

A υ B = B.

NCERT Solutions Class 11 Maths Chapter 1 Exercise 1.4 Question 3

If A and B are two sets such that A ⊂ B, then what is A ∪ B?

Summary:

If A and B are two sets such that A ⊂ B, then A ∪ B = B. Set A is a subset of set B if all the elements in set A are present in set B.