(n - 1) equal point masses each of mass m are placed at the vertices of a regular n-polygon. The vacant vertex has a position vector vecaw.r.t the centre of polygon. The position vector of centre of mass is

(n - 1) equal point masses each of mass m are placed at the vertices o

1.	(n - 1) equal point masses each of mass m are placed at the vertices of a regular n-polygon. The vacant vertex has a position vector vecaw.r.t the centre of polygon. The position vector of centre of mass is
Answer» `VECA/n` `veca/(1-n)` `(nveca)/(n-1)` `veca` ANSWER :B