यदि \(A=\{1,2,3,4,5\}\) है, तो (\mathcal{P}(A)) में ऐसे कितने तत्व हैं जिनमें (2) हो लेकिन (5) न हो?

If \(A=\{1,2,3,4,5\}\), how many elements of (\mathcal{P}(A)) contain (2) but not (5)?

Explanation opens after your attempt
Correct Answer

B. (8)

Step 1

Concept

Including (2) and excluding (5) are fixed. For the remaining (1,3,4), there are \(2^3=8\) choices.

Step 2

Why this answer is correct

The correct answer is B. (8). Including (2) and excluding (5) are fixed. For the remaining (1,3,4), there are \(2^3=8\) choices.

Step 3

Exam Tip

(2) रखना और (5) हटाना निश्चित है। बचे (1,3,4) के लिए \(2^3=8\) विकल्प हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4,5\}\) है, तो (\mathcal{P}(A)) में ऐसे कितने तत्व हैं जिनमें (2) हो लेकिन (5) न हो? / If \(A=\{1,2,3,4,5\}\), how many elements of (\mathcal{P}(A)) contain (2) but not (5)?

Correct Answer: B. (8). Explanation: (2) रखना और (5) हटाना निश्चित है। बचे (1,3,4) के लिए \(2^3=8\) विकल्प हैं। / Including (2) and excluding (5) are fixed. For the remaining (1,3,4), there are \(2^3=8\) choices.

Which concept should I revise for this Mathematics MCQ?

Including (2) and excluding (5) are fixed. For the remaining (1,3,4), there are \(2^3=8\) choices.

What exam hint can help solve this Mathematics question?

(2) रखना और (5) हटाना निश्चित है। बचे (1,3,4) के लिए \(2^3=8\) विकल्प हैं।