यदि \(A=\{1,2,3,4,5,6\}\) है, तो (\mathcal{P}(A)) में ऐसे subsets कितने हैं जिनमें (1) हो और cardinality even हो?
If \(A=\{1,2,3,4,5,6\}\), how many subsets in (\mathcal{P}(A)) contain (1) and have even cardinality?
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B. (16)
Simple Explanation
(1) fixed होने के बाद बाकी (5) तत्वों में odd number चुनना होगा, जिसकी संख्या \(2^{5-1}=16\) है। परीक्षा में total parity को fixed element से adjust करें। / After fixing (1), an odd number must be chosen from the remaining (5) elements, which is \(2^{5-1}=16\). In exams, adjust total parity using the fixed element.
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