It is possible that they were asking for an answer. But it is more likely that they used the question to emphasize their surprise at what Jesus said. Alternate translation: "Then no one can be saved from sin!" or in active form: "Then God will not save anyone!" (See: [[rc://en/ta/man/jit/figs-rquestion]] and [[rc://en/ta/man/jit/figs-activepassive]])