A box-and-whisker plot that could represent the number of students attending the classes include: C. box-and-whisker plot C.
In Mathematics and Statistics, the range of a data set can be calculated by using this mathematical expression;
Range = Highest number - Lowest number
In Mathematics and Geometry, a median refers to the middle number (center) of a sorted data set, which is when the data set is either arranged in a descending order from the greatest to least or an ascending order the least to greatest.
Median of box-and-whisker plot A = 9 (False)
Range of box-and-whisker plot B = 18 - 9 = 9 (False)
Median of box-and-whisker plot C = 13 (True)
Range of box-and-whisker plot C = 22 - 9 = 13 (True)