OEWe are given a box plot here where Q1 is the 1st quartile, Q2 is 2nd quartile and Q3 is 3rd quartile.
Also, we know that 75 percent of the values are less than quartile 3. (25 percent of
the values are less than quartile1, and 50 percent of the values are less than quartile2)
Between 10 and 18, 75 percent of the values lie that means 75 percent of the values
are less than 18 and more than 10.
Hence, the answer is 75.
More on GRE - Box-and-Whisker Plots
https://gre.myprepclub.com/forum/gre-bo ... tml#p82943