A sample of 55 streams in severe distress was obtained during 2007. The following bar graph illustrates the number of streams that are from the Northeast, Northwest, Southeast, or Southwest. In the bar graph, the bar for the Northeast has been omitted.
What percent of streams are not from the Northeast?

Question

Quizplus · Accepted Answer

Since the bar for the Northeast has been omitted, we have to subtract the number of streams from the other three regions from the total number of streams (55). We can estimate that the number of streams from the Northeast is around 15-20, which gives us:
55 - (10 + 12 + 18) = 15
Therefore, the percentage of streams that are not from the Northeast is:
100 x (55-15)/55 = 72.7%
Rounding to the nearest percent gives us choice C, which is 73%.

A Sample of 55 Streams in Severe Distress Was Obtained