Heat And Thermodynamics

A jar is filled with two monoatomic non-interacting gases $A$ and $B$ with total masses $M_A$ and $M_B$, respectively. The molar mass of $A$ is double the molar mass of $B$. If the jar is kept at temperature $T$, what is the ratio of the total pressure of the combined gas to the partial pressure due to the gas $A$?