\(यदि (A={1,2,3}), (B={2,3,4}) और (T={(x,y)\in A\times B:x+y\) 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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C. (5)
Simple Explanation
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। / 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.
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