For what concerns oxygen, V=2L and P=202.6kPa. T is 298K, a standard value, when you're not given a different temperature.
Hence, n = (P*V)/(R*T) = moles of oxygen
Do the same for neon.
Then use the sum of the moles of the two gases in the ideal gas law for calculating the final pressure (they give the volume, don't they?).