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20 people show up to a post-PSTAT 120A party. If everyone shakes hands with everyone else, how many handshakes take place

User Alesia
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1 Answer

1 vote

Answer: There are 190 handshakes takes place.

Explanation:

Since we have given that

Number of people in the party = 20

Here, n = 20

So, the number of handshakes would be


(n(n-1))/(2)\\\\=(20(20-1))/(2)\\\\=(20* 19)/(2)\\\\=10* 19\\\\=190

Hence, there are 190 handshakes takes place.

User Timofey
by
7.7k points
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