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

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estudierBest ResponseYou've already chosen the best response.2
A person can only shake the hand of 6 others.....
 one year ago

virtusBest ResponseYou've already chosen the best response.0
i don't think that is right
 one year ago

virtusBest ResponseYou've already chosen the best response.0
thats correct @mukushla but where does the 2 come from?
 one year ago

virtusBest ResponseYou've already chosen the best response.0
is it because person A shakes hands with person B And then person B shakes hands with person A
 one year ago

estudierBest ResponseYou've already chosen the best response.2
One can shake 6 so there are 7 by 6 but this counts a single handshake twice.
 one year ago

higgsBest ResponseYou've already chosen the best response.0
^they can't shake hands twice
 one year ago

virtusBest ResponseYou've already chosen the best response.0
oh i see so why is it 7C2?
 one year ago

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

virtusBest ResponseYou've already chosen the best response.0
@higgs the answer is 21 according to my solution book
 one year ago

estudierBest ResponseYou've already chosen the best response.2
Forget the handshakes, how many ways to choose 2 from 7 without regard to order?
 one year ago

estudierBest ResponseYou've already chosen the best response.2
2 people (ie 2 hands)
 one year ago

virtusBest ResponseYou've already chosen the best response.0
ohhhh i see , wow i guess thats a nice way to think about it
 one year ago
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