यदि \(A=\{1,2,3,4\}\) और \(R=\{(a,b):a+b=7\}\) है, तो (R) में कुल कितने ordered pairs हैं?
If \(A=\{1,2,3,4\}\) and \(R=\{(a,b):a+b=7\}\), how many ordered pairs are in (R)?
Explanation opens after your attempt
B. (2)
Concept
From the given set, ( (3,4) ) and ( (4,3) ) are formed. In ordered pairs, changing the order changes the pair.
Why this answer is correct
The correct answer is B. (2). From the given set, ( (3,4) ) and ( (4,3) ) are formed. In ordered pairs, changing the order changes the pair.
Exam Tip
दिए गए set से ( (3,4) ) और ( (4,3) ) बनते हैं। ordered pair में क्रम बदलने से pair बदल जाता है।
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