Mathematics, 14.05.2021 20:10 damian11154

There are 20 people in a room, If they all shake each other's hands once and only once, HOW MANY handshakes are there altogether?

There are 20 people in a room, If they all shake each other's hands once and only once, HOW MANY ha

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There are 20 people in a room, If they all shake each other's hands once and only once, HOW MANY han...

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