Difference of Sets

For any two sets $A$ and $B$, $A-\left(A-B\right)$ is equal to

Let $A$ be te set of non-negative integers, $I$ is the set of integers, $B$ is the set of non-positive integers, $E$ is the set of even integers and $P$ is the set of prime numbers then

If $X=\left\{x:x^2-12x+20=0\right\}$ and $Y=\left\{x:x^2+5x-14=0\right\}$, then $X-Y=$

When $A\subset B$, then $A-B=$

If $n\left(A\cup B\right)=97,n\left(A\cap B\right)=23$ and $n\left(A-B\right)=39$, then $n\left(B\right)$ is equal to

The set $B-A$ from the figure is  

The number of elements in set $A$ is $40$, the number of elements in the intersection of the sets $A,B$ is $25$. Find the number of Elements in the difference of two sets $A,B$.

In a class of $60$ students, $25$ students play cricket, $20$ students play tennis and $10$ students play both the games. Then the number of students who play tennis only is

As per question No.$\left(33\right)$ with the same order of options $\left(a\right), \left(b\right), \left(c\right)$ and $\left(d\right)$ the set $B\text{'}$ is

As per question No.$\left(24\right) A-B$  is

If $A∆B=(A-B)\cup (B-A)$ and $A=\{1,2,3,4\},B=\{3,5,7\}$ than $A∆B$ is

The sum of the digits in a three digit number is $12$. If the digits are reversed the number is increased by $495$but reversing only of the ten's and unit digits increases the number by $36$. The number is _____.

If number of terms in sets $n(\mathrm{A}-\mathrm{B})=20, n(\mathrm{A}\cup \mathrm{B})=80$ and $n(\mathrm{A}\cap \mathrm{B})=30,$ then find $n\left(\mathrm{B}\right).$

If $A \& B$ are two sets defined as, $A=\{x\mid -8<x<4,x\in \mathrm{\mathbb{Z}}\}$ and $B=\{x\mid -2<x\le 11, x\in \mathrm{\mathbb{Z}}\}$, then find $n\left(A∆B\right)$

If $R$ is the set of real numbers and $Q$ is the set of rational numbers, then what is $R-Q ?$

Let $A=\{3,6,12,15,18,21\},B=\{4,8,12,16,20\},C=\{2,4,6,8,10,12,14,16\}$ and  $D=\{5,10,15,20\}$. Find

$D-C$

Let $A=\{3,6,12,15,18,21\},B=\{4,8,12,16,20\},C=\{2,4,6,8,10,12,14,16\}$ and  $D=\{5,10,15,20\}$. Find

$C-D$

Let $A=\{3,6,12,15,18,21\},B=\{4,8,12,16,20\},C=\{2,4,6,8,10,12,14,16\}$ and  $D=\{5,10,15,20\}$. Find

$D-B$

Let $A=\{3,6,12,15,18,21\},B=\{4,8,12,16,20\},C=\{2,4,6,8,10,12,14,16\}$ and  $D=\{5,10,15,20\}$. Find

$C-B$

If $A=(-7,3]$, $B=[2,6]$ and $C=[4,9]$ Then find $A-B$