Demorgan's Law

Let $A=\left\{a, b, 1, 2, 3, 4\right\}, B=\left\{a, 1, 3\right\}$ and $C=\left\{b, 2, 3\right\}$. Verify De Morgan’s laws of set difference.

Let $A=\left\{1, 2, 3, 4\right\}, B=\left\{1, 3\right\}$ and $C=\left\{2, 3\right\}$. Verify De Morgan’s laws of set difference.

Let $A=\left\{10, 15, 20, 25\right\}, B=\left\{10, 15, c, d\right\}$ and $C=\left\{c, a\right\}$. Verify De Morgan’s laws of set difference.

Let $A=\left\{a, b, c, d\right\}, B=\left\{c, d\right\}$ and $C=\left\{c, a\right\}$. Verify De Morgan’s laws of set difference.

Let $A=\left\{a, b, c, d, e, f, g\right\}, B=\left\{1, 2, c, d, e\right\}$ and $C=\left\{d, e, f, g, 2\right\}$. Verify De Morgan’s laws of set difference.

If $A$and $B$ are subsets of a universal set $X$ and $n\left(X\right)=50, n\left(A\right)=35, n\left(B\right)=20, n\left(A^{\text{'}}\cap B^{\text{'}}\right)=5$

Find $n\left(A\cap B\right)$

If $A$and $B$ are subsets of a universal set $X$ and $n\left(X\right)=50, n\left(A\right)=35, n\left(B\right)=20, n\left(A^{\text{'}}\cap B^{\text{'}}\right)=5$. find $n\left(A\cup B\right)$

The set $\left(A\cup B\cup C\right)\cap {\left(A\cap B^{\text{'}}\cap C^{\text{'}}\right)}^{\text{'}}\cap C$ is equal to