At a conference, 10 members shook hands with each other before and after the meeting. How
many hand shakes occurred before?
Answers
Answered by
0
Answer:
10 handshakes occurs before the meeting.
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Answered by
2
Answer:
66
Step-by-step explanation:
The first person shook hands with 11 remaining people, the second person also shook hands with 11 people, but we count 10, as the hand shake with the first person has already been counted. We get: 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 66.
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