[" find "n" if "],[qquad C_(n+5)=25C_(2n-1)]

Find n, if ""^(n)C_(n-4)=5

Find n, if ""^(n)C_(n-4)=5

Find n if, ^(2n)C_(r-1) = ^(2n)C_(r+1)

(i) If ""^(2n)C_(3) : ""^(n)C_(3)= 11 : 1 , find n. (ii) If ""^(2n)C_(3) : ""^(n)C_(2) = 12 : 1 , find n.

(i) If ""^(n)C_(8)= ""^(n)C_(2) , find ""^(n)C_(2) . (ii) If ""^(n)C_(10)= ""^(n)C_(12) , determine n and hence ""^(n)C_(5) . (iii) If ""^(n)C_(9)= ""^(n)C_(8) , find ""^(n)C_(17) .

Find n if .^(n)C_(9)=.^(n)C_(5) .

Find the value of n in each of the following cases : if .^(20)C_(3n)=^(20)C_(2n+5)

if 25C_(n+5)=25C_(2n-1) then sum of all values of n is: