GMAT Quantitative Review
3.0 Math Review
3.4 Word Problems
10. Data Interpretation
Occasionally a question or set of questions will be based on data provided in a table or graph. Some examples of tables and graphs are given below.
Example 1:
Population by Age Group 

Age 
Population 
17 years and under 
63,376 
18−44 years 
86,738 
45−64 years 
43,845 
65 years and over 
24,054 
How many people are 44 years old or younger?
Solution: The figures in the table are given in thousands. The answer in thousands can be obtained by adding 63,376 thousand and 86,738 thousand. The result is 150,114 thousand, which is 150,114,000.
Example 2:
AVERAGE TEMPERATURE AND PRECIPITATION IN CITY X
What are the average temperature and precipitation in City X during April?
Solution: Note that the scale on the left applies to the temperature line graph and the one on the right applies to the precipitation line graph. According to the graph, during April the average temperature is approximately Celsius and the average precipitation is approximately 8 centimeters.
Example 3:
DISTRIBUTION OF AL’S WEEKLY NET SALARY
Al’s weekly net salary is $350. To how many of the categories listed was at least $80 of Al’s weekly net salary allocated?
Solution: In the circle graph, the relative sizes of the sectors are proportional to their corresponding values and the sum of the percents given is 100%. Note that is approximately 23%, so at least $80 was allocated to each of 2 categories—Rent and Utilities, and Savings—since their allocations are each greater than 23%.