JEE Advanced 2024 Chemistry question on d- and f-Block Elements

In a metal deficient oxide sample, $\text{M}_X\text{Y}_2\text{O}_4$ (M and Y are metals), M is present in both +2 and +3 oxidation states and Y is in +3 oxidation state. If the fraction of $\text{M}^{2+}$ ions present in M is $\dfrac{1}{3}$, the value of X is _____.