Find the Center of Mass of the Two- Dimensional System $(6,10)$

Multiple Choice

Find the center of mass of the two- dimensional system which has a mass of 3 at (4, 2) , a mass of 2 at $(6,10)$ , and a mass of 7 at $(0,6)$ .

A) $(3,5)$
B) $\left[2, \frac{17}{3}\right]$
C) $\left[\frac{31}{12}, \frac{17}{3}\right]$
D) $\left[\frac{31}{12}, \frac{17}{12}\right]$