\(यदि (A={1,2,3}), (B={2,3,4}) और (T={(x,y)\in A\times B:x+y\) is prime}), तो (n(T)) क्या है?
\(If (A={1,2,3}), (B={2,3,4}), and (T={(x,y)\in A\times B:x+y\) is prime}), what is (n(T))?
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Correct Answer
C. (5)
Concept
The prime sums possible are (3,5,7). The valid pairs are ((1,2),(1,4),(2,3),(3,2),(3,4)), so there are (5) pairs.
Why this answer is correct
The correct answer is C. (5). The prime sums possible are (3,5,7). The valid pairs are ((1,2),(1,4),(2,3),(3,2),(3,4)), so there are (5) pairs.
Exam Tip
योग (3,5,7) अभाज्य हो सकते हैं। सही युग्म ((1,2),(1,4),(2,3),(3,2),(3,4)) हैं, इसलिए (5) युग्म हैं।
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