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}) = $

If $A$ and $B$ are two sets, then $A \cap (A \cup B)'$ is equal to

Draw appropriate Venn diagram for each of the following:

$A^{\prime} \cap B^{\prime}$

Fill in the blanks to make each of the following a true statement :

$A \cup A^{\prime}=\ldots$

If $A$ and $B$ are two given sets, then $A \cap {(A \cap B)^c}$ is equal to

Let $U=\{1,2,3,4,5,6,7,8,9\}, A=\{1,2,3,4\}, B=\{2,4,6,8\}$ and $C=\{3,4,5,6\} .$ Find

$(A \cup B)^{\prime}$