A non-ideal binary solution clearly demonstrates a positive deviation from Raoult's law. The pure eq — Solutions and Colligative Properties Chemistry Question

Question

A non-ideal binary solution clearly demonstrates a positive deviation from Raoult's law. The pure equilibrium vapour pressures are $P_A^0 = 150\text{ mm Hg}$ and $P_B^0 = 250\text{ mm Hg}$. If $2\text{ moles}$ of A and $3\text{ moles}$ of B are thoroughly mixed, the observed experimental total vapour pressure was found to be $230\text{ mm Hg}$. Calculate the exact magnitude of the deviation in total vapour pressure (in $\text{mm Hg}$) from the theoretically predicted ideal behavior.