It is given that 
$$\begin{gathered} {\mathrm{P}}_1=\mathrm{P} {\mathrm{V}}_2=\mathrm{V} \\ {\mathrm{\mu }}_1=1 {\mathrm{T}}_2=2\mathrm{T} \\ {\mathrm{T}}_1=\mathrm{T} {\mathrm{\mu }}_2=1 \\ {\mathrm{V}}_1=\mathrm{V} {\mathrm{P}}_2=? \end{gathered}$$
We know that
$$\begin{gathered} \mathrm{PV}=\mathrm{\mu RT} \\ {\mathrm{P}}_1 {\mathrm{V}}_1={\mathrm{\mu }}_1\mathrm{RT} \\ {\mathrm{P}}_2{\mathrm{V}}_2={\mathrm{\mu }}_2{\mathrm{RT}}_2 \end{gathered}$$
Dividing Eq.(1) by Eq. (2), We get
$$\begin{gathered} \frac{{\mathrm{P}}_1{\mathrm{V}}_1}{{\mathrm{P}}_2{\mathrm{V}}_2}=\frac{{\mu }_1{\mathrm{RT}}_1}{{\mu }_2{\mathrm{RT}}_2} \\ \frac{\mathrm{P}}{{\mathrm{P}}_2}\mathrm{x}\frac{\mathrm{V}}{\mathrm{V}}=\frac{1\mathrm{xT}}{1\mathrm{x}2\mathrm{T}}\Rightarrow {\mathrm{P}}_2=2\mathrm{P} \end{gathered}$$