Q79. Which of the following algebraic structures is not a groupoid? (Assume E = set of even integers, O = set of odd integers, Z = set of all integers, and Q = set of rational numbers)Mathematics — NUST Mock By Dogers 2 — Question 79 of 200A. (E, +)B. (O, +)C. (Z, ×)D. (Q, ×)Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →