MCQ
Set $A$ has $3$ elements and set $B$ has $6$ elements. What can be the minimum number of elements in $\ce{A ∪ B}\ ?$
- ✓$6$
- B$3$
- C$9$
- D$18$
✓
Answer
Correct option: A.
$6$
$\ce{A ∪ B}$ must contain all the elements of the bigger set.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The equation of straight line passing through the intersection of the lines $x - 2y = 1$ and $x + 3y = 2$ and parallel to $3x + 4y = 0$ is
→In the figure given below, if the areas of the two regions are equal then which of the following is true?
For a frequency distribution mean deviation from mean is computed by:
Choose the conclusion of given statements:
All scientists working in America are talented. Some Indian scientists are working in America. Therefore, "Some Indian scientists are talented."
All scientists working in America are talented. Some Indian scientists are working in America. Therefore, "Some Indian scientists are talented."
If $\cot \theta=\frac{1}{2}$ and $\sec \phi=\frac{-5}{3}$, where $\theta$ lies in quadrant $III$ and $\phi$ lies in quadrant $II,$ then $\tan (\theta+\phi)=$ ?
→$1 + 0 i$ is, $...........$ for complex number $z.$
→A triangle with vertices $(4, 0),\, (-1, -1),\, (3, 5)$ is
→If the coefficients of ${x^2}$ and ${x^3}$ in the expansion of ${(3 + ax)^9}$ are the same, then the value of $a$ is
→${(r + 1)^{th}}$ term in the expansion of ${(1 - x)^{ - 4}}$ will be
→$A$ and $B$ are two events such that $P (A) = 0.25$ and $P (B) = 0.50.$ The probability of both happening together is $0.14.$ The probability of both $A$ and $B$ not happening is
→