If a variate x is expressed as a linear function of two variates u and v in the form $\mathrm{x}=\mathrm{au}+\mathrm{bv}$ then mean $\overline{\mathrm{x}} \mathrm{of} \mathrm{x} \mathrm{is}$

• A

  $\mathrm{a}\overline{\mathrm{u}}+\mathrm{b}\overline{\mathrm{v}}$

• B

  $\overline{\mathrm{u}}+\overline{\mathrm{v}}$

• C

  $\overline{\mathrm{b}}\mathrm{u}+\overline{\mathrm{a}}\mathrm{v}$

• D

  None of these