<prompt> For a group of n 250 subjects, 40th percentile would be the following value ?7th40th100th140th  <response>: Ans. is c i.e., 100th Percentile Centilel Centi les are values in a series of observations arranged in an ascending order of magnitude which divides a distribution into 100 equal pas So, number of interception required are 99, i.e., there are a total of 99 percentiles. Median is 50th centile. n percentile implies that n -- 1 of values are below it and 100 -- n of values are above it e.g. 40th percentile means 39 n -- 1 40 --1 values are below it and 60 100 -- n values are above it. From above figure you can easily understanded The values below 40th centile are upto 39th centile 39 Then comes 40th centile itself. 60 values 41-100 are above it. In general 