A certain amount of reducing agent reduces x mole of `KMnO_(4)` & y mole of `K_(2)Cr_(2)O_(7)` in di

A certain amount of reducing agent reduces x mole of `KMnO_(4)` & y mole of `K_(2)Cr_(2)O_(7)` in difference experiments in acidic medium. If the change in oxidation state of reducing agent is same in both experiments then `x:y` is

`K_(2)Cr_(2)O_(7)`