If ^n C_ 12 = ^n C_ 8 , is then n: - Vidyadip

MCQ

If ${^\text{n}}\text{C}_{\text{12}}={^\text{n}}\text{C}_{\text{8}},$ is then $n:$

✓
$20$
B
$12$
C
$6$
D
$30$

✓

Answer

Correct option: A.

$20$

$\text{n}=12+8=20$

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

If $z$ is a complex number satisfying $|z|^2 - |z| - 2 < 0$, then the value of $|z^2 + z sin \theta|$ , for all values of $\theta$ , is

The line $2x - y + 1 = 0$ is tangent to the circle at the point $(2, 5)$ and the centre of the circles lies on $x-2y=4$. The radius of the circle is

Mean of variable series $\bar{x}=773$ and mean deviation $64.4,$ then coefficient of mean deviation is :

In the expansion of $(1 + x + y + z)^4$ the ratio of coefficient of $x^2y, xy^2z, xyz$ are

For a frequency distribution $7^{th}$ decile is computed by the formula

In a city, the total income of all people with salary below $₹ 10000$ per annum is less than the total income of all people with salary above $₹ 10000$ per annum. If the salaries of people in the first group increases by $5 \%$ and the salaries of people in the second group decreases by $5 \%$, then the average income of all people

Let A and B be finite sets containing m and n elements respectively. The number of relations that can be defined from A to B is

What is the slope of a line which is parallel to $x-$axis?

If the constant term in the expansion of $\left(\frac{\sqrt[5]{3}}{x}+\frac{2 x}{\sqrt[3]{5}}\right)^{12}, x \neq 0$, is $\alpha \times 2^8 \times \sqrt[5]{3}$, then $25 \alpha$ is equal to :

In an examination there are three multiple choice questions and each question has $4 $ choices. Number of ways in which a student can fail to get all answers correct, is