The green square is the larger square, the total area for the target would be 8 x 8 = 64 square units.
The area of the smaller yellow square would be 4 x 4 = 16 square units.
The green area would be the difference between the total target area and the yellow area: 64 - 16 = 48 square units.
The probability of hitting the green area = 48 / 64 = 0.75
The answer is C.