Some problems are
visual. They may involve objects, places, or physical situations. To
solve such a problem, draw a picture to show relationships among the
given data. Then use the relationships to find the answer.
Venn
diagrams helps you organize information.
Example

There are 26 students in the
class with siblings. Eleven students have brothers. Seven
students have brothers and sisters. How many students have
only sisters? 



There
are 8 students
who have only sisters. 

