If 2nC3: nC3 = 12 : 1, find n.

Given: 2nC3: nC3 = 12 : 1


To find: n=?


2nC3: nC3 = 12 : 1









2n-1=3(n-2)


2n-1=3n-6


n=6-1=5


Ans:n=5


1