Find n, if C(n,2) = C (n,3)

Find n, if ""^(2n)C_(1),""^(2n)C_(2) and ""^(2n)C_(3) are in A.P.

If " C(n,7)= C(n,5) , find C(n,4) .

Determine n if "^(2n)C_3 : "^nC_3 = 11 : 1

Determine n if "^(2n)C_3 : "^nC_3 =12:1

The number of positive integers satisfying the inequality C(n+1,n-2) - C(n+1,n-1)<=100 is

Find the value of n , if ((2n)! (n - 3)!)/((2n - 3)! n!) = 11

Find the value of n , if (2n - 1)/(n - 2) = 3

The sum to infinity of the series 1+2(1-(1)/(n))+3(1-(1)/(n))^(2)+ . . .. . . . , is (A) n^(2) (B) n(n+1) (C) n(1+(1)/(n))^(2) (D)None of these

Statement-1 If U is universal set and B = U - A, then n(B) = n(U) - n(A). Statement-2 For any three arbitrary sets A, B and C, if C = A - B, then n(C ) = n(A) - n(B).