Expert Mathematics Sets Class 11 Level 7

यदि \(A=\{1,2,3,4\}\) है तो (A) के कितने उपसमुच्चय (1) को नहीं रखते?

If \(A=\{1,2,3,4\}\) then how many subsets of (A) do not contain (1)?

Explanation opens after your attempt
Correct Answer

B. (8)

Step 1

Concept

After removing (1), the remaining (3) elements form \(2^3=8\) subsets. In exams remove the forbidden element first.

Step 2

Why this answer is correct

The correct answer is B. (8). After removing (1), the remaining (3) elements form \(2^3=8\) subsets. In exams remove the forbidden element first.

Step 3

Exam Tip

(1) को हटाने पर बचे (3) तत्वों से \(2^3=8\) उपसमुच्चय बनते हैं। परीक्षा में निषिद्ध तत्व को पहले हटाएं।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4\}\) है तो (A) के कितने उपसमुच्चय (1) को नहीं रखते? / If \(A=\{1,2,3,4\}\) then how many subsets of (A) do not contain (1)?

Correct Answer: B. (8). Explanation: (1) को हटाने पर बचे (3) तत्वों से \(2^3=8\) उपसमुच्चय बनते हैं। परीक्षा में निषिद्ध तत्व को पहले हटाएं। / After removing (1), the remaining (3) elements form \(2^3=8\) subsets. In exams remove the forbidden element first.

Which concept should I revise for this Mathematics MCQ?

After removing (1), the remaining (3) elements form \(2^3=8\) subsets. In exams remove the forbidden element first.

What exam hint can help solve this Mathematics question?

(1) को हटाने पर बचे (3) तत्वों से \(2^3=8\) उपसमुच्चय बनते हैं। परीक्षा में निषिद्ध तत्व को पहले हटाएं।

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