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(i) If there are 12 persons in a party,...

(i) If there are 12 persons in a party, and if each two of them shake hands with each other, how many handshakes happen ?
(ii) In a student's reunion meeting in a school, 16 students show up. Each shakes hands with each other exactly once. Determine the total number of handshakes.

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The correct Answer is:
(i) 66 (ii) 120
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