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Handshakes

At the end of a meeting 4 people shake hands with each other. How many handshakes will there be in total?

Not 8


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deepaksays...

it's 6. the first person has a handshake with 3 others. the second person has two more handshakes, since the 3 former handshakes already includes the first person. the third person has one more handshake with the last person, since the handshake with the first two have already been included. The last person has already had a handshake with everyone.

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Regular
Kevsays...

it's combinations not permutations

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charlottesays...

got this intuitively, can't really explain it

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Yuliasays...

3+ 2+ 1

gets you the answer