Medal true or false the coefficient of x^k y^n-k in the expansion of (x+y)^n equals (n-k / k),

The statement The coefficient of x^k y^n-k in the expansion of (x+y)^n equals (n-k / k) is true.  This will show the standard formula and the expansion of it. We all know that it can still be expanded based on the power or degree of the terms.