If there are n tuples in the partition and the rank of the tuple is r, then its is defined as (r −1)/(n−1). April 12, 2021 by admin Question: If there are n tuples in the partition and the rank of the tuple is r, then its is defined as (r −1)/(n−1). A. ntil() B. cum_rank C. percent_rank D. rank() Answer» c. percent_rank Note: The above multiple-choice question is for all general and Competitive Exams in India.