Answer: 1/2 ( aka 50%) but the answer is 1/2
Using the box plot, it is found that 200 is the median, that is 50% of the books had 200 or fewer pages.
It is a plot that focuses the interquartile range of the population, that is, it gives:
The first quartile.
The median.
The third quartile.
In this problem, they are given as follows:
The first quartile is of 175.
The median is of 200.
The third quartile is of 250.
Hence, 50% of the books had 200 or fewer pages.