Prince's GWA for 3 semesters was 2.34 for 42 units. His fourth semester GWA was 2.33 for 14 units. What is his GWA for all 4 semesters?

(2.34*42 + 2.33*14)/(42+14) = 2.3375

this is really rather pointless, since the GWA was virtually identical for all the units!
just what you'd expect. 14 is 1/3 of 42, so it is 1/4 of the total.
So, the GWA will be 3/4 of the way from 2.33 to 2.34