Let $U$ be the universal set of all the students of Class $XI$ of a coeducational school and $A$ be the set of all girls in Class $XI$. Find $A'$.
(N/A) The universal set $U$ consists of all students in Class $XI$,which includes both boys and girls.
$A$ is the set of all girls in Class $XI$.
By definition,the complement of a set $A$,denoted by $A'$,is the set of all elements in $U$ that are not in $A$.
Therefore,$A' = U - A$ represents the set of all students in Class $XI$ who are not girls,which means $A'$ is the set of all boys in Class $XI$.
$A$ is the set of all girls in Class $XI$.
By definition,the complement of a set $A$,denoted by $A'$,is the set of all elements in $U$ that are not in $A$.
Therefore,$A' = U - A$ represents the set of all students in Class $XI$ who are not girls,which means $A'$ is the set of all boys in Class $XI$.
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