Two containers of equal volume containing the same gas at pressure P₁ and P₂ and absolute temperature T₁ and T₂ respectively were connected with narrow capillary tube. The gas reaches a common pressure P and a common temperature T. The ratio P/T is equal to

• A

  $\frac{{\mathrm{P}}_1}{{\mathrm{T}}_1}+\frac{{\mathrm{P}}_2}{{\mathrm{T}}_2}$

• B

  $\frac{1}{2}\left(\frac{{\mathrm{P}}_1}{{\mathrm{T}}_1}+\frac{{\mathrm{P}}_2}{{\mathrm{T}}_2}\right)$

• C

  $\frac{{\mathrm{P}}_1{\mathrm{T}}_2+{\mathrm{P}}_2{\mathrm{T}}_1}{{\mathrm{T}}_1+{\mathrm{T}}_2}$

• D

  $\frac{{\mathrm{P}}_1{\mathrm{T}}_2-{\mathrm{P}}_2{\mathrm{T}}_1}{{\mathrm{T}}_1-{\mathrm{T}}_2}$