Question

in nc2:2nc1=3:2, find n

Answer 1

Answer:

n = 7

Step-by-step explanation:

n! / 2!(n-2)! : 2n! / 1!(2n-1)! = 3:2

n(n-1)(n-2)! / 2(n-2)! : 2n(2n-1)! / (2n-1)! = 3:2

n(n-1)/2 : 2n = 3:2

$\frac{\frac{n(n - 1)}{2} }{2n} = \frac{3}{2}$

$\frac{n - 1}{4} = \frac{3}{2}$

$n - 1 = 6$

$n = 7$