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# Reading Tables, Graphs, and Charts for Firefighter Exam Study Guide (page 2)

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Updated on Jun 23, 2011

### Charts

Finally, you may be presented information in the form of a chart like the following pie chart. Here, the accident figures have been converted to percentages. In this figure, you don't see the exact number of fatalities, but you see how each of the age groups relates to the others as part of the overall number of fatalities.

### Practice

Try the following questions to hone your skill at reading tables, graphs, and charts.

1. What is the number of injuries per 1,000 caused by smoking?
1. 53
2. 63
3. 72
4. 160
2. Based on the information provided in the chart, which cause of ignition is responsible for the most number of injuries in residential fires?
1. electrical distribution
2. other equipment
3. open flame
4. appliances

Answer questions 3 and 4 on the basis of the following graph.

1. To what percentage of fires is the response time 5 minutes?
1. 15
2. 14
3. 16
4. 10
2. What percentage of fires was responded to in less than 6 minutes?
1. 61
2. 71
3. 37
4. 47

1. d. Smoking accounts for 16% of the losses, so 16% of 1,000 = 1,000 × 0.16 = 160 injuries per 1,000 fires.
2. c. "Electrical Distribution" and "Other Equipment" account for 7% of the injuries each. The category "Appliances" accounts for 9%. "Open Flame," the correct answer, accounts for 13% of the injuries in residential fires. This is not the largest cause overall, but it is the largest of the choices given.
3. b. Although it is not labeled, 5 minutes is the column between 4 and 6 minutes. Its value is 14%.
4. a. You have to be very careful reading this question. The question wants you to find out the total percentage of fires responded to in less than 6 minutes, which includes all percentages from 0 minutes to 5 minutes, but does NOT include 6 minutes. The sum of percentages is therefore 2.5% (0 minutes) + 4% (1 minute) + 10% (2 minutes) + 15% (3 minutes) + 16% (4 minutes) + 14% (5 minutes) = 61.5%. The closest answer is 61%.