A ∪ (B∪ C) = (A ∪ B )∪C and A ∩ (B∩C)= (A ∩ B) ∩C is known as / » Mathematical Tools for Economics 1 solved MCQs / By admin Question: A ∪ (B∪ C) = (A ∪ B )∪C and A ∩ (B∩C)= (A ∩ B) ∩C is known as A. de morgan’s law B. distributive law C. associative law D. commutative law Answer» c. associative law Note: The above multiple-choice question is for all general and Competitive Exams in India.