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To estimate the number of students who borrow graphic novels when they visit the library, we can use proportions based on the survey results.
According to the survey, 5 out of 60 students borrowed graphic novels. This can be expressed as a proportion:
5/60 = x/340
Cross multiplying, we get:
60x = 5 * 340
60x = 1700
x = 1700 / 60
x = 28.33
Rounded to the nearest whole number, approximately 28 students borrow graphic novels when they visit the library.