यदि \(A=\{a,b,c\}\) है तो (\mathcal{P}(A)) में (a) को न रखने वाले उपसमुच्चयों की संख्या कितनी है?

If \(A=\{a,b,c\}\), how many subsets in (\mathcal{P}(A)) do not contain (a)?

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

Keep (a) out and (b,c) each have two choices included or not. The number is \(2^2=4\).

Step 2

Why this answer is correct

The correct answer is C. (4). Keep (a) out and (b,c) each have two choices included or not. The number is \(2^2=4\).

Step 3

Exam Tip

(a) को बाहर रखें और (b,c) के लिए शामिल या न शामिल दो विकल्प होंगे। संख्या \(2^2=4\) है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{a,b,c\}\) है तो (\mathcal{P}(A)) में (a) को न रखने वाले उपसमुच्चयों की संख्या कितनी है? / If \(A=\{a,b,c\}\), how many subsets in (\mathcal{P}(A)) do not contain (a)?

Correct Answer: C. (4). Explanation: (a) को बाहर रखें और (b,c) के लिए शामिल या न शामिल दो विकल्प होंगे। संख्या \(2^2=4\) है। / Keep (a) out and (b,c) each have two choices included or not. The number is \(2^2=4\).

Which concept should I revise for this Mathematics MCQ?

Keep (a) out and (b,c) each have two choices included or not. The number is \(2^2=4\).

What exam hint can help solve this Mathematics question?

(a) को बाहर रखें और (b,c) के लिए शामिल या न शामिल दो विकल्प होंगे। संख्या \(2^2=4\) है।