Taking the set of natural numbers as the universal set, write down the complements of the following sets:
$\{ x:x$ is a prime number $\} $
Let $\mathrm{U}$ be universal set of all the students of Class $\mathrm{XI}$ of a coeducational school and $\mathrm{A}$ be the set of all girls in Class $\mathrm{XI}$. Find $\mathrm{A}'.$
Taking the set of natural numbers as the universal set, write down the complements of the following sets:
$\{x: x+5=8\}$
Given $n(U) = 20$, $n(A) = 12$, $n(B) = 9$, $n(A \cap B) = 4$, where $U$ is the universal set, $A$ and $B$ are subsets of $U$, then $n({(A \cup B)^C}) = $
Draw appropriate Venn diagram for each of the following:
$A^{\prime} \cap B^{\prime}$