Asked by Tom
At the medal presentation, each person shook hands with every other person. If 10 handshakes took place, how many people were present?
Answers
Answered by
marjean
5 people
Person 1, 2, 3, 4, 5
1&2 1&3 1&4 1&5 2&3 2&4 2&5 3&4 3&5 4&5
Person 1, 2, 3, 4, 5
1&2 1&3 1&4 1&5 2&3 2&4 2&5 3&4 3&5 4&5
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