^xC_7 −^xC_5 = 0, then x =: - Vidyadip

MCQ

$^xC_7 −^xC_5 = 0$, then $x =:$

A
$7$
B
$5$
✓
$12$
D
$10$

✓

Answer

Correct option: C.

$12$

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

Explore more

More "M.C.Q (1 Marks)" from Permutation and Combinations→Permutation and Combinations — all question types→Maths STD 11 Science question papers→CBSE Board STD 11 Science question papers→CBSE Board question paper generator→

Similar questions

$\mathop {\lim }\limits_{x \to \infty } \frac{{(x - 1)(2x + 3)}}{{{x^2}}} = $

If the sum of three numbers of a arithmetic sequence is $15$ and the sum of their squares is $83$, then the numbers are

The value of $2 \sin \left(12^{\circ}\right)-\sin \left(72^{\circ}\right)$ is

What is the distance of $(5, 12)$ from the origin?

Suppose ${z_1},\,{z_2},\,{z_3}$ are the vertices of an equilateral triangle inscribed in the circle $|z|\, = 2$. If ${z_1} = 1 + i\sqrt 3 ,$ then values of ${z_3}$ and ${z_2}$ are respectively

The equation of the circle passing through the points $(0, 0), (0, b)$ and $(a, b)$ is

In $A.P. 171, 162, 153, ……….$ Find first negative term.

Let $0 < z < y < x$ be three real numbers such that $\frac{1}{ x }, \frac{1}{ y }, \frac{1}{ z }$ are in an arithmetic progression and $x$, $\sqrt{2} y, z$ are in a geometric progression. If $x y+y z$ $+z x=\frac{3}{\sqrt{2}} x y z$, then $3(x+y+z)^2$ is equal to $............$.

If $\text{f(x)}=\cos^2\text{x}+\sec^2\text{x},$ then :
$[$Hint: $\text{A.M}\geq\text{G.M.}]$

If $\ ^\text{n}\text{P}_5 = 60\ ^\text{n-1}\text{P}_3,$ the value of $n$ is: