27. The average length of any four fingers of my left band is 6 min. Then the average length of all the five fingers of my le hand is : (a) 800 mm (b) 750 mm (C) 480 mm (d) can't be determined 5. 27. The average length of any four fingers of my left band is 6 min. Then the average length of all the five fingers of my le hand is : (a) 800 mm (b) 750 mm (C) 480 mm (d) can't be determined 5