Q31. If the number of combinations of n items taken r at a time is nCr = 35 and the number of permutations is nPr = 210, what are the values of n and r, respectively?Mathematics — Permutation, Combination and Probability — Question 31 of 302A. n = 7, r = 3B. n = 5, r = 6C. n = 3, r = 10D. n = 2, r = 3Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →