(8) लोगों की सभा में कितने हाथ मिलाने होंगे यदि हर जोड़ा ठीक एक बार हाथ मिलाए?
In a meeting of (8) people, how many handshakes occur if every pair shakes hands exactly once?
Explanation opens after your attempt
B. (28)
Concept
Each handshake corresponds to choosing (2) people. Hence the number is \(^{8}C_{2}=28\).
Why this answer is correct
The correct answer is B. (28). Each handshake corresponds to choosing (2) people. Hence the number is \(^{8}C_{2}=28\).
Exam Tip
हर हाथ मिलाना (2) लोगों के चयन के बराबर है। इसलिए संख्या \(^{8}C_{2}=28\)।
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