यदि \(A=\{1,2,3,4\}\), तो (A) के ऐसे उपसमुच्चयों की संख्या कितनी है जिनमें 1 हो या 2 हो?

If \(A=\{1,2,3,4\}\), how many subsets contain 1 or 2?

Explanation opens after your attempt
Correct Answer

B. 12

Step 1

Concept

There are 16 total subsets, and those containing neither 1 nor 2 are the \(2^2=4\) subsets of ({3,4}). Hence (16-4=12).

Step 2

Why this answer is correct

The correct answer is B. 12. There are 16 total subsets, and those containing neither 1 nor 2 are the \(2^2=4\) subsets of ({3,4}). Hence (16-4=12).

Step 3

Exam Tip

कुल 16 उपसमुच्चय हैं और जिनमें न 1 है न 2, वे ({3,4}) के \(2^2=4\) उपसमुच्चय हैं। इसलिए (16-4=12)।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4\}\), तो (A) के ऐसे उपसमुच्चयों की संख्या कितनी है जिनमें 1 हो या 2 हो? / If \(A=\{1,2,3,4\}\), how many subsets contain 1 or 2?

Correct Answer: B. 12. Explanation: कुल 16 उपसमुच्चय हैं और जिनमें न 1 है न 2, वे ({3,4}) के \(2^2=4\) उपसमुच्चय हैं। इसलिए (16-4=12)। / There are 16 total subsets, and those containing neither 1 nor 2 are the \(2^2=4\) subsets of ({3,4}). Hence (16-4=12).

Which concept should I revise for this Mathematics MCQ?

There are 16 total subsets, and those containing neither 1 nor 2 are the \(2^2=4\) subsets of ({3,4}). Hence (16-4=12).

What exam hint can help solve this Mathematics question?

कुल 16 उपसमुच्चय हैं और जिनमें न 1 है न 2, वे ({3,4}) के \(2^2=4\) उपसमुच्चय हैं। इसलिए (16-4=12)।