Which one is correct: "bachelor's and master's degrees", or without apostrophes? [duplicate]
Solution 1:
If you say John and Mary's car, it means one car, which belongs to both John and Mary.
Similarly, if you say bachelor and master's degree, it would refer to one degree which is both a bachelor's and master's, and pluralizing degree would refer two many such degrees. Since we're talking about two degrees, we need two apostrophes.