Chapter 11 - Additional Topics - 11.6 - Pie, Bar, and Line Graphs - Problem Set 11.6 - Page 502: 10

$52\%$

26% of the students chose biology. 22% of the students chose oceanography. To find the percentage of students that chose either biology or oceanography, we simply add these two percents. 26%+22%=48%. To find the percentage that did not take biology or oceanography, we must subtract this percentage from the whole, which is 100%. 100%-48%=52%.