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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

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B

set of all students of class IX

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C

set of all students of class I to VIII

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D

set of all students from classes I to IX

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Solution

## 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

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