![If there are 12 persons in a party, and if each two of them shake hands with each other, ho - YouTube If there are 12 persons in a party, and if each two of them shake hands with each other, ho - YouTube](https://i.ytimg.com/vi/XrPdnNmTB3U/mqdefault.jpg)
If there are 12 persons in a party, and if each two of them shake hands with each other, ho - YouTube
Is there a formula for the number of people? Like, there were 10 handshakes, how many people are there? In this case, it's five, but is there a formula to find this
![At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party? - Quora At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party? - Quora](https://qph.cf2.quoracdn.net/main-qimg-baccfdd05f668dd51a3e88e7a2678659.webp)
At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party? - Quora
If 5 people meet each other and each shakes hands only once with each of the others, how many handshakes will there have been? - Quora
At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party? - Quora
![Number of Handshakes between 'n' people : Formula | Handshake Problem | Two Methods of Counting - YouTube Number of Handshakes between 'n' people : Formula | Handshake Problem | Two Methods of Counting - YouTube](https://i.ytimg.com/vi/54eyhykWXys/hqdefault.jpg)