In a party there are 123 persons present. If each of them shakes hand with all the other persons, in total how many handshakes will takes place?
This problem can be solving by computing the combination of 123 persons in pairs without repetition. C123,2 = 123! / 2! ( 123 - 2) ! = 122 x 123 / 2 = 7503
In a party there are 24 persons present. If each of them shakes hand with all the other persons, in total how many handshakes will takes place?
All attendees to a party are introduced to one another. 21 handshakes are made in total. How many people are attending the party?
If seven people meet each other and each shakes hands only once with each of the others, how many handshakes will there have been?
In a party there are 49 persons present. If each of them shakes hand with all the other persons, in total how many handshakes will takes place?
