M L Aggarwal Solutions for Chapter: Operations on Sets; Venn Diagrams, Exercise 2: Objective Type Questions

If $\mathrm{A}, \mathrm{B}$ are two sets, then $\mathrm{A}\cup \mathrm{B}=${$x:x\in A$ _____ $x\in B$}.

If $\mathrm{A}, \mathrm{B}$ are two sets, then $\mathrm{A}\cap \mathrm{B}=\{x\mid x\in A or x\in z\}$. Then $x=$ _____ .

If $A, B$ are two sets, then $\mathrm{A}-\mathrm{B}=$$\{x\mid x\in A$ or $x\notin$_____ $\}$.

$A$ and $B$ are disjoint sets if and only if $\mathrm{A}$_____$\mathrm{B}=\varphi$ .( intersection, union)

$A$ and $B$ are overlapping sets if and only if $\mathrm{A}\cap \mathrm{B}\ne$ _____. $\left(\mathrm{Null} / \mathrm{A} / \mathrm{B}\right)$

If the set $\{x:x\in \mathrm{W},x<3\}$ in the roster form is $\left\{a,b,c\right\}$, then the value of $a+b+c$ is _____ .

If $\xi =${all digits in our number system} and $\mathrm{A}=\left\{1,2,3,4,5\right\}$, then $\mathrm{A}\text{'}=$?

In a town of $840$ persons, $450$ persons read Hindi, $300$ read English and $200$ read both. Then the number of person who read neither is