## Thinking Mathematically (6th Edition)

$$I\ \ region$$
we have this information $U=\left\{\begin{array}{l} {\text { Elementary school teachers, police officer, surgeion, }} \\ {\text {Banker, Family doctor, Lawyer }} \end{array} \right.$ $A=$ The set of jobs for which more than 20$\%$ prefer men. $\ \ \ =\{\text { Police officer, surgeon, Family doctor, lawyer }\}$ $B=$ The set of jobs for which more than 20$\%$ prefer women, $\ \ \ =\{\text { Elementary school teacher, Banker, Family doctor }\}$ $A \cap B=$ The common jobs which more than 20$\%$ prefer men and women $\quad\quad\quad=\{\text { Family doctor }\}$ So we can see that $\text{Police officer}$ is a job that belongs in $A$ but not in $B$; therefore, it belongs in the $I$ region.