If A = {{1,2},3,4}, which of the following is not a subset of A?
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Answer and explanation
Correct answer: {1,2}
The elements of A are the set {1,2}, the number 3, and the number 4. A subset may contain only elements that are directly in A. Options A, B, and C use 3, 4, and/or the whole element {1,2}, so they are subsets. Option D contains 1 and 2 separately, but neither is a direct element of A; therefore it is not a subset.
Frequently asked questions
What is the correct answer to this question?
{1,2}
Why is this the correct answer?
The elements of A are the set {1,2}, the number 3, and the number 4. A subset may contain only elements that are directly in A. Options A, B, and C use 3, 4, and/or the whole element {1,2}, so they are subsets. Option D contains 1 and 2 separately, but neither is a direct element of A; therefore it is not a subset.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Sets. Topic: Power Set and Subsets.
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