The Formula for the percentile rank is -
Where
PR = stands - Percentile Rank
N = Total no. of scores and RK =

Correct option is B

In calculating a Percentile Rank using the standard formula , the symbol RK represents the Rank of the score from the top.
Basic information about the topic: Percentile Rank (PR) indicates the percentage of scores in a distribution that fall at or below a specific score, where RK denotes the ordinal position of the score when ranked from highest to lowest.
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Explanation of the correct answer in pointers in detail
· Definition of RK (Rank from Top): In the standard percentile rank formula , RK stands specifically for the rank of a particular score counted from the top (where the highest score has a rank of 1).
· Role of N: N represents the total number of scores or sample size within the given distribution.
· Correction Factor (-50): The term -50 acts as a continuity correction factor (representing half a step, or 0.5 x 100), ensuring that the midpoint of the score's interval is accounted for accurately across continuous data.
· Inverse Relationship: Because RK counts from the top (where a smaller rank number means a higher score), subtracting the fractional term from 100 correctly converts a high rank position into a high percentile rank.