Left After 1st stroke = 1/2
So removed = 1- 1/2 = 1/2
If 1/2 of the air in a tank is removed with each stroke of a vacuum pump, what fraction of the original amount of air has been removed after 1 strokes ?
Options:
a: 1/2
b: 7/8
c: 1/4
d: 1/8
e: 1/16