The area of the big rectangle is:
[tex]6\text{units}\times11units=66\text{square units.}[/tex]The area of the red rectangle is:
[tex]2\text{units}\times7units=14\text{ square units.}[/tex]Therefore the area of the yellow region is:
[tex]66\text{ square units-14 square units=52 square units.}[/tex]Answer: 52 square units.