Home
Class 11
MATHS
if nC12 = nC8, then n is equal to...

if `nC_12 = nC_8, then n is equal to

A

20

B

12

C

6

D

30

Text Solution

Verified by Experts

The correct Answer is:
20
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    KUMAR PRAKASHAN|Exercise NCERT EXEMPLAR PROBLEMS (OBJECTIVE TYPE QUESTIONS)|15 Videos

  • PERMUTATIONS AND COMBINATIONS

    KUMAR PRAKASHAN|Exercise NCERT EXEMPLAR PROBLEMS (FILLERS)|8 Videos

  • PERMUTATIONS AND COMBINATIONS

    KUMAR PRAKASHAN|Exercise NCERT EXEMPLAR PROBLEMS (SHORT ANSWER TYPE QUESTIONS)|20 Videos

  • OBJECTIVE SECTION AS PER NEW PAPER SCHEME

    KUMAR PRAKASHAN|Exercise Sequence and Series (Fill in the blanks )|48 Videos

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    KUMAR PRAKASHAN|Exercise NCERT EXEMPLAR PROBLEMS (QUESTION OF MODULE )|11 Videos

Similar Questions

Explore conceptually related problems

If ""_nP_r= 840 and ""^nC_r=35 , then r is equal to....

If f(x)=(a-x^(n))^(1/n) , where a gt 0 and n in N , then fof (x) is equal to

If l= LCM of 8!, 10! and 12! and h = HCF of of 8!, 10! and 12! then l/h is equal to

Let f: N -> R and g : N -> R be two functions and f(1)=0.8, g(1)=0.6 , f(n+1)=f(n)cos(g(n))-g(n)sin(g(n)) and g (n+1)=f(n) sin(g(n))+g(n) cos(g(n)) for n>=1 . lim_(n->oo) f(n) is equal to

If the n^(th) terms of an A.P. 9, 7, 5,….. is equal to the n^(th) term of an A.P. 15, 12, 9……then find n

If n(A)=4,n(B)=3,n(AxxBxxC)=24 , then n(C ) equals

If ""^nC_10= ""^nC_12 then find ""^23C_n .

Statement-1 If 10 coins are thrown simultaneously, then the probability of appearing exactly foour heads is equal to probability of apppearing exactly six heads. Statement-2 .^nC_r=.^nC_s implies either r=s or r+s=n and P(H)=P(T) in a single trial.

If one root of the equation ax^2 + bx + c = 0 is equal to the n^(th) power of the other, then (ac^n)^(1/(n+1)) + (a^n c)^(1/(n+1)) + b is equal to

Let n=10lambda+r, where lambda,rinN, 0lerle9. A number a is chosen at random from the set {1, 2, 3,…, n} and let p_n denote the probability that (a^2-1) is divisible by 10. If 1lerle8, then np_n equals

Home
Profile