यदि (|A|=4), (|B|=5) और \(R\subseteq A\times B\), तो (R) में अधिकतम कितने अवयव हो सकते हैं?
If (|A|=4), (|B|=5), and \(R\subseteq A\times B\), what is the maximum possible number of elements in (R)?
Explanation opens after your attempt
Correct Answer
B. (20)
Concept
Since (R) can be at most the whole \(A\times B\), and \(|A\times B|=20\). If maximum elements are asked, do not write \(2^{20}\).
Why this answer is correct
The correct answer is B. (20). Since (R) can be at most the whole \(A\times B\), and \(|A\times B|=20\). If maximum elements are asked, do not write \(2^{20}\).
Exam Tip
क्योंकि (R) अधिकतम पूरे \(A\times B\) के बराबर हो सकता है और \(|A\times B|=20\)। अधिकतम अवयव पूछे जाएँ तो \(2^{20}\) नहीं लिखें।
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