यदि (n(A)=4), (n(B)=5) और दोनों समुच्चय अरिक्त हैं, तो \(A\times B\) और \(B\times A\) की अवयव संख्या के बारे में सही कथन कौन सा है?
If (n(A)=4), (n(B)=5) and both sets are non-empty, which statement about the number of elements in \(A\times B\) and \(B\times A\) is correct?
Explanation opens after your attempt
B. दोनों में (20) अवयव होंगेboth have (20) elements
Concept
Both have \(4\times5=20\) elements. The number can be the same but the order of pairs is generally different.
Why this answer is correct
The correct answer is B. दोनों में (20) अवयव होंगे / both have (20) elements. Both have \(4\times5=20\) elements. The number can be the same but the order of pairs is generally different.
Exam Tip
दोनों की अवयव संख्या \(4\times5=20\) होगी। संख्या समान हो सकती है पर युग्मों का क्रम सामान्यतः अलग होता है।
Login to save your score, XP, coins and progress.
