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  4. Let R be an equivalence relation on a finite set A having n elements. Then, the number of ordered pairs in R is

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Q. Let $R$ be an equivalence relation on a finite set $A$ having $n$ elements. Then, the number of ordered pairs in $R$ is

Relations and Functions - Part 2

Solution:

As $R$ is an equivalence relation on set $A$.
Hence, $R$ has atleast $n$ ordered pairs.