Student fees at the 19 Cal State campuses will rise 10% for residents and 21% for out-of-staters in September, the system’s Board of Trustees has decided. In-state full-time students will pay $750 a year for their education and non-residents will pay $5,670, excluding the extra costs of parking, room and board, and campus activity fees. The sole vote against the fee hike was cast by student Trustee John Sweeney of Cal Poly San Luis Obispo. About 100 students protested the proposed hikes at the trustees’ meeting in Long Beach. Last October, trustees adopted a 3.6% tuition increase for fall, 1989. But Gov. George Deukmejian proposed raising it 10% because of budget shortfalls. The trustees followed the governor’s plan. Referring to projections that 186,000 students will be added to the current 355,000 system enrollment by the year 2000, Chancellor W. Ann Reynolds said officials will be studying the possibility of building new campuses.