For this chain-of-thought reasoning and answer, what was the question?
Left After 1st stroke = 1/2
So removed = 1- 1/2 = 1/2
A: (A)
Q: 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