Question

At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?

Answer 1

let x = 66 handshakes

Answer 2

There are n people in the room
Now we have to find different combinations for handshakes which is same as choosing 2 guys from a sample on n
nC2 = 66

Answer 3

there were 12 people
say you are one of them
then you shake hands with 11 people
12 people do this
11*12 = 122
removing duplicates we get 66

Answer 4

aw maaan

Answer 5

GOOD @zzr0ck3r

Answer 6

now for the tie breaker :-)

Answer 7

NEW QUESTION!