https://ls.berkeley.edu/advising/planning/schedule-planning/double-majors-and-simultaneous-degrees says that “No more than two upper division courses may be used in common to fulfill requirements in both majors.”
https://ls.berkeley.edu/advising/planning/schedule-planning/double-majors-and-simultaneous-degrees says that “No more than two upper division courses may be used in common to fulfill requirements in both majors.”