The associative law of union is / » Mathematics for Economic Analysis 1 solved MCQs / By admin Question: The associative law of union is A. a u (b u c) = (a u B. u c = a u b u c (b) a u b = b u a C. a u b = a u c D. b u c = b u a Answer» a. a u (b u c) = (a u Note: The above multiple-choice question is for all general and Competitive Exams in India.