Problem: Verse nine says he was “taken up dead.” But in the very next verse Paul said, “his life is in him.”
Solution: His life was in him only after Paul had performed the miracle (v. 10), not before (v. 9).
“And there sat in a window a certain young man named Eutychus, being fallen into a deep sleep: and as Paul was long preaching, he sunk down with sleep, and fell down from the third loft, and was taken up dead. And Paul went down, and fell on him, and embracing him said, Trouble not yourselves; for his life is in him. (Acts 20:9-10)”