What are total number of combinations of 9 things taken 3 at a time? March 1, 2024April 17, 2024 CSS MPT Arithmetic MCQs (A) 18(B) 27(C) 48(D) 84 The answer is: (D) 84Combinations = [9!]/[3!(9-3)!] = [9.8.7.6!]/[3!.6!] = 504/6 = 84