4 people come to a party and shake hands with each other. If each person shakes the hand of every other​ person, how many handshakes​ occur?

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4 people come to a party and shake hands with each other. If each person shakes the hand of every other​ person, how many handshakes​ occur?

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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3+2+1

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Other answers:

6
lol
Lets assume the 4 people are ABC and D ok?
ok
hello
So A shakes hand with the three others: BC and D
ok
ok
then B shakes hand with C and D
kk
kk
At last we have to add the shaking hand between C and D
5 ?
So if we add all we get 3+2+1=?
6
Right try sketching the situation :-)
is that answer
yep
Like this:-) https://sketch.io/render/sketch55e0bed1ee9f1.png
How many double arrows are there?
They are the number of hand shakes :-)

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