Three Particles Having Masses 1, 2, and 3 Kg Are $\frac { 1,125 } { 8 }$

Multiple Choice

Three particles having masses 1, 2, and 3 kg are located on the x-axis at 3,1,-1 respectively. The center of mass of this system is located at x =

A) $\frac { 1,125 } { 8 }$
B) $\frac { 1 } { 3 }$
C) 2
D) $\frac { 15,625 } { 24 }$
E) $\frac { 125 } { 24 }$