.20 men shake hand with each other. Maximum no of handshakes w without cyclic
handshakes.

• 19 handshakes
  
• 13 years agoHelpfull: Yes(3) No(9)
• 20C2 ans because of no cyclic repittion
• 10 years agoHelpfull: Yes(2) No(0)
• 20C2 if there can be a cycle,
  but without cycle
  n-1;
  20-1=19;
• 13 years agoHelpfull: Yes(1) No(4)
• In case of circular sequence,possible number of handshakes can be given as:
  
  No. of candidates itself in case even number of candidates are there.
  No. of candidates-1 in case of odd number of candidates.
  
  While in case no circular sequence is followed:
  No of possible handshakes are: n*(n-1)/2
  ie: 20(20-1)/2=10*19=190
• 11 years agoHelpfull: Yes(1) No(0)