Two solutions containing non-volatile solutes $\text{'}P\text{'}$ and $\text{'}Q\text{'}$  are prepared, with a molar mass ratio of $M_P:M_Q=1:3$. When these solutions are combined to create two final solutions X and Y with same mass of solute. Molar ratio of P & Q is 2:3 and 3:2, in 
X & Y respectively. What will be the ratio of elevation in boiling point for X to Y? (Assume no reaction between P, Q and water)