how many handshakes can be done in a convention with 20 people, if everyone is about to shake others's hands once
A. 40
B. 80
C. 150
D. 190
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how many handshakes can be done in a convention with 20 people, if everyone is about to shake others's hands once
A. 40
B. 80
C. 150
D. 190
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Answer:
letter D. 190
Step-by-step explanation:
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