Home
Class 11
MATHS
If frac{(10-n)!}{(9-n)!} = 6 then n =...

If `frac{(10-n)!}{(9-n)!} = 6` then ` n = `

A

16

B

8

C

12

D

4

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

frac{(2n)!}{(1.3.5….(2n-1))n!} =

If P(n, 5) : P(n-1, 4) = 6 : 1 then

If ^(n)C_8 = ^(n)C_6 then n = ....... .

"^(n^2-n)C_2 = "^(n^2-n)C_10 , then n =

If n (A) = 7, n(B) = 9 and n( A uu B ) 14, then n( A nn B ) = .....

If [frac{1+isqrt3}{1-isqrt3}]^n is a integer, then n is

If X={4^(n)-3n-1 : n in N} and Y={9(n-1) : n in N} , then

If n(A) =5, n(A cup B) = 9 , n(A cap B)=2 , find n(B).

If frac{1}{x}+x = 2costheta , then x^n+frac{1}{x^n} is equal to