Class 9 Mathematics · Chapter 3 · Test 2
Venn Diagrams
25 MCQs
24 questions · 20 min · 24 marks
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Sample questions
The first 5 of 24. Try each one, then tap to see the answer.
Question 1
Which identity expresses the commutative law of union?
- AA∪B=A∩B
- BA∪B=B∪A
- CA∪B=A−B
- DA∪B=A
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Answer: B
The order of sets does not change their union.
Question 2
Which identity expresses the commutative law of intersection?
- AA∩B=B∩A
- BA∩B=A∪B
- CA∩B=A−B
- DA∩B=∅
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Answer: A
Intersection is unchanged when the sets are interchanged.
Question 3
Which is the associative law of union for three sets?
- AA∪(B∩C)=(A∪B)∩C
- BA∪(B∪C)=(A∪B)∪C
- CA∪B=B∪A
- DA∪∅=A
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Answer: B
Grouping does not affect the union of three sets.
Question 4
Which is the associative law of intersection?
- AA∩(B∩C)=(A∩B)∩C
- BA∩B=B∪A
- CA∩(B∪C)=(A∩B)∪C
- DA∩U=∅
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Answer: A
Grouping does not affect the intersection of three sets.
Question 5
Which identity represents union distributed over intersection?
- AA∪(B∩C)=(A∪B)∩(A∪C)
- BA∩(B∪C)=(A∪B)∩C
- CA∪(B∩C)=(A∩B)∪C
- DA∪B=A∩B
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Answer: A
Union distributes over intersection using both unions on the right.
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