If in the given figure $\overrightarrow{OA} = \vec{a}$,$\overrightarrow{OB} = \vec{b}$ and $AP : PB = m : n$,then $\overrightarrow{OP} = $

  • A
    $\frac{m\vec{a} + n\vec{b}}{m + n}$
  • B
    $\frac{n\vec{a} + m\vec{b}}{m + n}$
  • C
    $m\vec{a} - n\vec{b}$
  • D
    $\frac{m\vec{a} - n\vec{b}}{m - n}$

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