Final answer:
Both nongovernmental not-for-profit and public colleges and universities typically receive revenue from tuition and fees, federal grants and contracts, and investment income.
Step-by-step explanation:
A typical source of revenue for both nongovernmental not-for-profit and public colleges and universities is tuition and fees. Other common sources include federal grants and contracts, as well as investment income. All of the mentioned sources, including tuition and fees, federal grants, and investment income, serve as fundamental streams of revenue to support the institutions' operations and educational services.
Revenues from tuition and fees are direct payments from students for the educational services provided, whereas federal grants and contracts often support specific research projects or institutional programs. Investment income typically originates from endowment funds or other financial assets held by the institution.