Three masses of $2\,kg$,$4\,kg$,and $4\,kg$ are placed at the three points $(1, 0, 0)$,$(1, 1, 0)$,and $(0, 1, 0)$ respectively. The position vector of its center of mass is:

  • A
    $\frac{3}{5}\,\hat{i} + \frac{4}{5}\,\hat{j}$
  • B
    $3\hat{i} + \hat{j}$
  • C
    $\frac{2}{5}\,\hat{i} + \frac{4}{5}\,\hat{j}$
  • D
    $\frac{1}{5}\,\hat{i} + \frac{4}{5}\,\hat{j}$

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