यदि (|U|=15), (|A'|=6), तो (|A|) क्या होगा?
If (|U|=15), (|A'|=6), what is (|A|)?
Explanation opens after your attempt
B. (9)
Concept
A set and its complement together form (U). Hence (|A|=15-6=9).
Why this answer is correct
The correct answer is B. (9). A set and its complement together form (U). Hence (|A|=15-6=9).
Exam Tip
पूरक और समुच्चय मिलकर (U) बनाते हैं। इसलिए (|A|=15-6=9)।
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