In a get-together party, every person present shakes the hand of every other person. If there were 90 handshakes in all, how manypersons were present at the party?

In a get-together party, every person present shakes the hand of every

1.	In a get-together party, every person present shakes the hand of every other person. If there were 90 handshakes in all, how manypersons were present at the party?
A.	15
B.	14
C.	16
D.	17
Answer» C. 16