MCQ
Consider the following equations:
  1. $\text{A - B}=\text{A}-(\text{A }\cap \text{ B})$
  2. $\text{A}=({\text{A }​​\cap \text{ B}})\cup(\text{A }-\text{ B})$
  3. $\text{A}-(\text{B }\cup\text{ C})=(\text{A - B})\cup(\text{A - C})$
Which of these is/are correct?
  • A
    1 and 3
  • B
    2 only
  • C
    2 and 3
  • 1 and 2

Answer

Correct option: D.
1 and 2
  1. 1 and 2

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Let $\left\{a_{n}\right\}_{n-1}^{\infty}$ be a sequence such that $a_{1}=1, a_{2}=1$ and $a_{n+2}=2 a_{n+1}+a_{n}$ for all $n \geq 1 .$ Then tha value of $47 \sum_{n=1}^{\infty} \frac{a_{n}}{2^{3 n}}$ is equal to $.....$
The ends of a rod of length $l$ move on two mutually perpendicular lines. The locus of the point on the rod which divides it in the ratio $1 : 2$ is
$10$ different letters of English alphabet are given. Out of these letters, words of $5$ letters are formed. How many words are formed when at least one letter is repeated
Four distinct points $(2 \mathrm{k}, 3 \mathrm{k}),(1,0),(0,1)$ and $(0,0)$ lie on a circle for $k$ equal to :
For the frequency distribution :

Variate $( x )$ $x _{1}$ $x _{1}$ $x _{3} \ldots \ldots x _{15}$
Frequency $(f)$ $f _{1}$ $f _{1}$ $f _{3} \ldots f _{15}$

where $0< x _{1}< x _{2}< x _{3}<\ldots .< x _{15}=10$ and

$\sum \limits_{i=1}^{15} f_{i}>0,$ the standard deviation cannot be 

Let $z$ satisfy $\left| z \right| = 1$ and $z = 1 - \vec z$.

Statement $1$ : $z$ is a real number

Statement $2$ : Principal argument of $z$ is $\frac{\pi }{3}$

Choose the correct answers: Domain of $\sqrt{\text{a}^2-\text{x}^2}(\text{a}>0)$ is.
Connect “0 is positive number” and “0 is a negative number”?
If the geometric mean between $a$ and $b$ is $\frac{{{a^{n + 1}} + {b^{n + 1}}}}{{{a^n} + {b^n}}}$, then the value of $n$ is
If for some positive integer $n,$ the coefficients of three consecutive terms in the binomial expansion of $(1+x)^{n+5}$ are in the ratio $5: 10: 14,$ then the largest coefficient in this expansion is