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Mathematical Reasoning
easy
Which Venn diagram represent the truth of the statements “No child is naughty”
Where $U$ = Universal set of human beings, $C$ = Set of children, $N$ = Set of naughty persons
A

B

C

D
None of these
Solution
(a) “No child is naughty” means $C \cap N = \phi$
i.e. there is no common element between $C$ and $N.$
Standard 11
Mathematics