Question

If U, the universal set, is the set of all students of a school which are in classes from I to X and B = set of all students of class X.

What is B'?

• A. set of all students of class VIII
• B. set of all students of class IX
• C. set of all students of class I to VIII
• D. set of all students from classes I to IX

Answer 1

The correct option is D

set of all students from classes I to IX

U = set of all students from classes I to IX

The complement of a subset B of universal set U is the set of all elements of U which are not the elements of B .

Hence B' = set of all students from classes I to IX