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:

A
20
B
12
C
6
D
30

✓

Answer

20

Solution:

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

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→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

If $\alpha$ and $\beta$ are the roots of 4x²+ 3x + 7 = 0, then the value of $\frac{1}{\alpha}+\frac{1}{\beta}$ is:

In a class of 100 students there are 70 boys whose average marks in a subject are 75 If the average marks of whole class is 72 then what is the average marks of the girls?

If A, B and C are any three sets, then $\text{A}-(\text{B }\cup\text{ C})$ is equal to.

If the lines x + q = 0, y - 2 = 0 and 3x + 2y + 5 = 0 are concurrent, then the value of q will be:

The distance between the foci of a hyperbola is 16 and its eccentricity is $\sqrt2$ , then equation of the hyperbola is

Range of $\text{f(x)}=\frac{1}{1-2\cos\text{x}}$ is.

$\Big[\frac{1}{3}, 1\Big]$
$\Big[-1, \frac{1}{3}\Big]$
$(-\infty, -1]\cup\Big[\frac{1}{3},\infty\Big)$
$\Big[-\frac{1}{3}, 1\Big]$

The length of the perpendicular drawn from the point P(3, 4, 5) on y-axis is

In a class of 50 students 35 opted for Mathematics and 37 opted for Biology How may have opted for only Mathematics? ( Assume that each student has to opt for at least one of the subjects)

If the fifth term of the expansion $\Big(\text{a}^{\frac{2}{3}}+\text{a}^{-1}\Big)^{\text{n}}$ does not contain 'a'. Then n is equal to:

The total number of 9 digit numbers which have all different digits is