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anonymous
 3 years ago
There are 7 people at a party and they shake each other's hand once. How many hand shakes are there?
anonymous
 3 years ago
There are 7 people at a party and they shake each other's hand once. How many hand shakes are there?

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0A person can only shake the hand of 6 others.....

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i don't think that is right

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0thats correct @mukushla but where does the 2 come from?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0is it because person A shakes hands with person B And then person B shakes hands with person A

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0One can shake 6 so there are 7 by 6 but this counts a single handshake twice.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0^they can't shake hands twice

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0oh i see so why is it 7C2?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0like i get how you say its like 6+5+4+3+2+1 =21 which is the same ans as 7C2

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0@higgs the answer is 21 according to my solution book

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Forget the handshakes, how many ways to choose 2 from 7 without regard to order?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.02 people (ie 2 hands)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ohhhh i see , wow i guess thats a nice way to think about it
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