Using the PTA data:15, 20, 25, 30, 20, 35, 40, 25, 20, 30, 4…

Using the PTA dаtа:15, 20, 25, 30, 20, 35, 40, 25, 20, 30, 45, 25, 20, 35, 50, 30, 25, 20, 40, 30cаlculate:  Range