A square-shaped blue glass has its front surface divided into 9 equal regions and its back surface divided into 36 equal regions, with some regions on these surfaces painted black as shown in the figure. Regions that are blue on both sides of this glass allow light to pass through, while regions that are painted black on at least one side do not allow light to pass through. Given that the total area of the regions that do not allow light to pass through is 35 square units, what is the total area of the regions that allow light to pass through in square units? A) 18 B) 16 C) 14 D) 12 E) 10
A square-shaped blue glass has its front surface divided into 9 equal regions and its back surface divided into 36 equal regions, with some regions on these surfaces painted black as shown in the figure.
Regions that are blue on both sides of this glass allow light to pass through, while regions that are painted black on at least one side do not allow light to pass through.
Given that the total area of the regions that do not allow light to pass through is 35 square units, what is the total area of the regions that allow light to pass through in square units?
A) 18
B) 16
C) 14
D) 12
E) 10