Ch 2 Section 2 Question 1<br>
<br>
Let A be the set of students who live within one mile of school and let 
B be the set of students who walk to classes<br>
<br>

a)  A &cap  B<br>

The intersection of A and B are the set of students who live within one 
mile of school and who walk to class.<br>
<br>
b)  A &cup B<br>

The union of A and B are the set of students who live within one mile of 
school or who walk to class or both.<br>
<br>
c) A - B<br>

The subtraction of B from A are the set of students who live within one 
mile of school and who do not walk to class.<br>
<br>
d) B - A <br>

The subtraction of A from B are the set of students who walk to class 
and who do not live within one mile.   <br>