'Seventy five' in the Bible

So Abram went forth as the Lord had spoken to him; and Lot went with him. Now Abram was seventy-five years old when he departed from Haran.

These are all the years of Abraham’s life that he lived, one hundred and seventy-five years.

Then Joseph sent word and invited Jacob his father and all his relatives to come to him, seventy-five persons in all.