Could any one please help to do this problem?

Question

The normal boiling point of methanol is 64.7C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 516.7 torr at 64.7C. What is the mole fraction of methanol in this solution?

Answer 1

you are missing some piece of info, basically you have  to use pv = nRT formula

and then use mole fraction = moles of methanol/moles of solution

but i dont see how it can be solved using the info you have provided