Mathematics, 10.11.2021 22:10 isamilo520
At a gathering of 15 people, there are 10 people who all know each other and 5 people who know no one. People who do not know each other shake hands. How many handshakes occur?
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At a gathering of 15 people, there are 10 people who all know each other and 5 people who know no on...
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