If A = {1, 2, 3} and B = {1, 2, 3, 4}, which statement is correct?
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Answer and explanation
Correct answer: A ⊆ B
The governing concept is subset notation. A ⊆ B means that every element of A must also belong to B. The elements 1, 2, and 3 all occur in B, so A is a subset of B. Conversely, B is not a subset of A because 4 is missing from A. The sets are also unequal, and 4 ∉ A. Therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
A ⊆ B
Why is this the correct answer?
The governing concept is subset notation. A ⊆ B means that every element of A must also belong to B. The elements 1, 2, and 3 all occur in B, so A is a subset of B. Conversely, B is not a subset of A because 4 is missing from A. The sets are also unequal, and 4 ∉ A. Therefore option A is correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Common Questions. Topic: General chapter practice.
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