सीमित समुच्चयों के लिए (n\(A\times B\)) और (n\(B\times A\)) के बारे में सही कथन कौन सा है?
For finite sets, which statement about (n\(A\times B\)) and (n\(B\times A\)) is correct?
Explanation opens after your attempt
Correct Answer
A. (n\(A\times B\)=n\(B\times A\))
Concept
Both counts are (n(A)n(B)), so the numbers are equal. Remember that counts may be equal even when the sets are different.
Why this answer is correct
The correct answer is A. (n\(A\times B\)=n\(B\times A\)). Both counts are (n(A)n(B)), so the numbers are equal. Remember that counts may be equal even when the sets are different.
Exam Tip
दोनों की संख्या (n(A)n(B)) होती है, इसलिए संख्याएं बराबर होती हैं। ध्यान रखें कि संख्या बराबर हो सकती है पर समुच्चय अलग हो सकते हैं।
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