यदि \(A=\{1,2,3,4,5\}\), तो (P(A)) के कितने अवयवों में ठीक (3) अवयव होंगे?

If \(A=\{1,2,3,4,5\}\), how many elements of (P(A)) have exactly (3) elements?

Explanation opens after your attempt
Correct Answer

B. (10)

Step 1

Concept

Subsets with exactly (3) elements are \(\binom{5}{3}=10\). Use combinations for size-based counting in a power set.

Step 2

Why this answer is correct

The correct answer is B. (10). Subsets with exactly (3) elements are \(\binom{5}{3}=10\). Use combinations for size-based counting in a power set.

Step 3

Exam Tip

ठीक (3) अवयव वाले उपसमुच्चय \(\binom{5}{3}=10\) होते हैं। पावर सेट में आकार आधारित गिनती के लिए संयोजन लगाएं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4,5\}\), तो (P(A)) के कितने अवयवों में ठीक (3) अवयव होंगे? / If \(A=\{1,2,3,4,5\}\), how many elements of (P(A)) have exactly (3) elements?

Correct Answer: B. (10). Explanation: ठीक (3) अवयव वाले उपसमुच्चय \(\binom{5}{3}=10\) होते हैं। पावर सेट में आकार आधारित गिनती के लिए संयोजन लगाएं। / Subsets with exactly (3) elements are \(\binom{5}{3}=10\). Use combinations for size-based counting in a power set.

Which concept should I revise for this Mathematics MCQ?

Subsets with exactly (3) elements are \(\binom{5}{3}=10\). Use combinations for size-based counting in a power set.

What exam hint can help solve this Mathematics question?

ठीक (3) अवयव वाले उपसमुच्चय \(\binom{5}{3}=10\) होते हैं। पावर सेट में आकार आधारित गिनती के लिए संयोजन लगाएं।