Where does banks get the money it lends its customerand about how much it gets from its source?

Banks primarily get the money they lend to customers from deposits made by individuals and businesses, which typically account for a significant portion of their funding. They also obtain funds through borrowing from other financial institutions and the central bank, as well as through issuing bonds and other securities. Additionally, banks can leverage their capital reserves to create loans, often using a fractional reserve banking system, where they lend out more than they hold in deposits. Overall, the amount they lend is often several times greater than their actual deposits, depending on regulatory requirements and their business model.