Ask
your own question, for FREE!
Mathematics
4 Online
OpenStudy (anonymous):
At a gathering of 10 people, each person must shake each other person's hand once. How many handshakes must there be?
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
Well how many people involve an handshake?
OpenStudy (anonymous):
Two.
OpenStudy (anonymous):
Exactly.
OpenStudy (anonymous):
Is order important?
OpenStudy (anonymous):
It is 10C2, but why isn't it 2^10?
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
Okay so you have the math right.
OpenStudy (anonymous):
You assume that each people has a choice. The can shake hands or they can't shake hands.
OpenStudy (anonymous):
They MUST shake hands. So you can't say 2^10 .
OpenStudy (anonymous):
Thank you!
OpenStudy (anonymous):
Welcome :) .
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
playtsec:
how do I sleep without getting a sore throat? I always wake up with a sore throat but it goes away later in the day.
75:
how do you react when you deal with someone who plays the victim in every single situation, and do you find this behavior childish or annoying.
JohnnyLFowler0812:
Do you guys ever think that the homeless are going to be healthy and freed from h
JohnnyLFowler0812:
Do you guys ever think that Hikaru Nikanura will ever be take Magnus Calrsen's 1st place title in the wolrdin the United States amd Norway? Right now Hikaru
DoltonCarlee:
what are y'all's options on S A T essays because honestly their not that bad
thereneelg:
Can someone give me a summary of article 231, The war guilt clause?? I need to explain what it is, but I can't find any shortened version of what it is and
luisaam2:
What should you do when the person you want to talk to the most is the one making
playtsec:
how do I sleep without getting a sore throat? I always wake up with a sore throat but it goes away later in the day.
4 hours ago
8 Replies
2 Medals
75:
how do you react when you deal with someone who plays the victim in every single situation, and do you find this behavior childish or annoying.
5 hours ago
2 Replies
0 Medals
JohnnyLFowler0812:
Do you guys ever think that the homeless are going to be healthy and freed from h
2 hours ago
7 Replies
1 Medal
JohnnyLFowler0812:
Do you guys ever think that Hikaru Nikanura will ever be take Magnus Calrsen's 1st place title in the wolrdin the United States amd Norway? Right now Hikaru
7 hours ago
2 Replies
0 Medals
DoltonCarlee:
what are y'all's options on S A T essays because honestly their not that bad
7 hours ago
7 Replies
2 Medals
thereneelg:
Can someone give me a summary of article 231, The war guilt clause?? I need to explain what it is, but I can't find any shortened version of what it is and
3 days ago
7 Replies
1 Medal
luisaam2:
What should you do when the person you want to talk to the most is the one making
2 days ago
16 Replies
1 Medal