5 people became friends at a Summer Camp. On the last day, they shook each other's hands to say farewell. How many handshakes were there?

Question

angelab97 · Answer

5

anonymous · Answer

i think 25 i dont know if i am right but that is what i can up with :/

goldphenoix · Answer

Yeah. I also agree with Filthy, 20.

directrix · Answer

@AngelaB97 Code of conduct: OpenStudy values the Learning process - not the ‘Give you an answer’ process Don’t post only answers - guide the asker to a solution. http://openstudy.com/code-of-conduct

anonymous · Answer

ok @Directrix ... 5 ppl . each person shook the other 4 persons hands. 5*4 = 20

directrix · Answer

Two hands are required.

There are 5 choices for the first hand and then 4 for the second hand.

The product of 5 and 4 is 20 BUT is 20 the number of unique handshakes or TWICE that?

anonymous · Answer

How are there 5 choices for the 1st hand? Explain plz

goldphenoix · Answer

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