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At the end of a meeting all participants...

At the end of a meeting all participants shook hands with each other. Twenty-eight handshakes were exchanged. How many people were at the meeting?

A

7

B

8

C

14

D

28

Text Solution

Verified by Experts

The correct Answer is:
B
`(("x people"),(2))=28.(x(x-1))/(2*1)=28.x^(2)-x=56.x=8`.
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