If A={1,2,3,4} and B={3,4,5,6}, what is A∪B?
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Answer and explanation
Correct answer: {1,2,3,4,5,6}
The union A∪B contains every distinct element that belongs to A or to B, without repeating common elements. Combining A={1,2,3,4} with B={3,4,5,6} gives 1, 2, 3, 4, 5, and 6. Hence A∪B={1,2,3,4,5,6}, so option D is correct. Option A is only the intersection.
Frequently asked questions
What is the correct answer to this question?
{1,2,3,4,5,6}
Why is this the correct answer?
The union A∪B contains every distinct element that belongs to A or to B, without repeating common elements. Combining A={1,2,3,4} with B={3,4,5,6} gives 1, 2, 3, 4, 5, and 6. Hence A∪B={1,2,3,4,5,6}, so option D is correct. Option A is only the intersection.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Sets. Topic: Operations on Sets (Union, Intersection, Difference).
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