Answer

(d) A
Explanation: Common between set A and $(A \cup B)$ is set A itself

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

If p, q be two A.M.'s and G be one G.M. between two numbers, then G2 =
 A sequence is called ___________________ if an+1 = an × r.

The sample space for choosing 2 letters at random from a set of 55 vowels is ____.

The contrapositive of statement ‘If Chandigarh is capital of Punjab, then Chandigarh is in India’ is.

  1. If Chandigarh is not in India, then Chandigarh is not the capital of Punjab.
  2. If Chandigarh is in India, then Chandigarh is Capital of Punjab.
  3. If Chandigarh is not capital of Punjab, then Chandigarh is not capital of India.
  4. If Chandigarh is capital of Punjab, then Chandigarh is not in India.
Each set $X _{ r }$ contains 5 elements and each set $Y _{ r }$ contains 2 elements and $\bigcup_{r=1}^{20} x_r=S=\bigcup_{r=1}^n Y_r$. If each element of $S$ belong to exactly 10 of the $X_r$ 's and to exactly 4 of the $Y_r$ 's, then $n$ is
The vertex of the parabola x2 + 8x + 12y + 4 = 0 is
In a class of 50 students, 10 did not opt for math, 15 did not opt for science and 2 did not opt for either. How many students of the class opted for both math and science.
The coefficient of x4 in $\Big(\frac{\text{x}}{2}-\frac{3}{\text{x}^{2}}\Big)$ is:
    The value of $\cos(36^\circ-\text{A})\cos(36^\circ+\text{A})+\cos(54^\circ-\text{A})\cos(54^\circ+\text{A})$ is:
    1. $\cos2\text{A}$
    2. $\sin2\text{A}$
    3. $\cos\text{A}$
    4. $0$

    If $\tan\alpha=\frac{1}{7},\tan\beta=\frac{1}{3},$ then $\cos2\alpha$ is equal to:

    1. $\sin2\beta$

    2. $\sin4\beta$

    3. $\sin3\beta$

    4. $\cos2\beta$