Question

Which of the following properties are associative law ?

• A. $A\cup B=B\cup A$
• B. $A\cup C=C\cup A$
• C. $A\cup D=D\cup A$
• D. $(A\cup B)\cup C=A\cup (B\cup C)$

Answer 1

Answer: (D)

Correct answer is (d) $(A\cup B)\cup C=A\cup (B\cup C)$