21 people meet and shake hands. The maximum number of handshakes possible if there is no cycle of handshakes is
(A cycle of handshakes is a sequence of people a1, a2,.... ,ak such that the pairs (a1, a2), (a2, a3), (a(k-1), ak), (ak, a1) shake hands.
a) 17 b) 18 c) 19 d) 20

• As It Is No Cyclic Max Num Of Shake Hands Are 21-1=20
• 13 years agoHelpfull: Yes(8) No(1)
• no cycle n-1
  cycle nC2
  ans=20
• 13 years agoHelpfull: Yes(5) No(2)
• ans is n-1=21-1=20
  
• 13 years agoHelpfull: Yes(3) No(1)