20 people are there, they are shaking hands together, how many hand shakes possible, if they are in no pair of cyclic sequence.
a) 19
b) 21
c) 28
d) 7

• cyclic handshakes n.
  acyclic handshakes n-1.
  so here 20-1=19 handshakes.
• 12 years agoHelpfull: Yes(11) No(2)
• if 20 peoples shake hands together not in cyclic manner then the handshake is like{(a1,a2),(a2,a3),(a3,a4)..........}then in this manner the no of handshakes is 19
• 12 years agoHelpfull: Yes(5) No(1)
• total cyclic handshake = n
  total non cyclic handshake =n-1
  total possible handshake = 20-1=19
  Answer A is correct
• 12 years agoHelpfull: Yes(5) No(1)
• ans is 19..as {a1,a2),(a2,a3)...(a19,a20) shake hands....since its not a cyclic sequence..it will be 1 less dan 20...
• 12 years agoHelpfull: Yes(3) No(2)