Find the Center of Mass of the Linear System $m _ { 1 } = 1 , m _ { 2 } = 9 , m _ { 3 } = 6$

Multiple Choice

Find the center of mass of the linear system $m _ { 1 } = 1 , m _ { 2 } = 9 , m _ { 3 } = 6$ $x _ { 1 } = - 3 , \quad x _ { 2 } = - 1$ $x _ { 3 } = 1$ .

A) $- \frac { 3 } { 8 }$
B) $\frac { 3 } { 8 }$
C) 6
D) $\frac { 2 } { 3 }$
E) $- \frac { 3 } { 4 }$
F) $\frac { 3 } { 4 }$
G) $- 6$
H) $- \frac { 2 } { 3 }$