OK, so we know that there is a supermassive black hole at the center of every galaxy. But I want to ask where is the mass of a black hole actually. When the black hole is formed and if there is a supernova or hypernova then much of the mass is ejected out then how can we says black hole has a significant mass. And if the mass is actually present is at the singularity and if yes than how is it possible for such a small point to possess so much mass. Please do correct me where I am wrong and thnx in advance for any reply.