यदि (|A|=6), तो (\mathcal{P}(A)) में कितने तत्व ऐसे हैं जिनका आकार (2) या (4) है?
If (|A|=6), how many elements of (\mathcal{P}(A)) have size (2) or (4)?
Explanation opens after your attempt
B. (30)
Concept
The number is \(\binom{6}{2}+\binom{6}{4}=15+15=30\). Use combinations for size-based subset questions.
Why this answer is correct
The correct answer is B. (30). The number is \(\binom{6}{2}+\binom{6}{4}=15+15=30\). Use combinations for size-based subset questions.
Exam Tip
ऐसे उपसमुच्चयों की संख्या \(\binom{6}{2}+\binom{6}{4}=15+15=30\) है। आकार आधारित प्रश्नों में संयोजन लगाएँ।
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