Q139. Which of the following represents the number of ways to arrange r objects selected from a set of n distinct objects, where the order of arrangement is important?Mathematics — Permutation, Combination and Probability — Question 139 of 302A. nCrB. nPrC. (n+r)!D. (n × r)!Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →