19 people (a1, a2, �.. , a19) are invited to a party. The host and the hostess shake hands with each invitee and also with each other. The invitees shake hands in a circular fashion, i.e. the pairs (a1, a2), (a2, a3), ��..,(a18, a19), (a19, a1) shake hands. So, in all there are 58 handshakes. Let S be a set of people such that every pair in S shake hands. The size of S is at most
O 2
O 3
O 1

• ans=4. in these 1 is host other is hostess and other 2 are from any one pair. like a1&a2 or a2&a3 etc...........
• 11 years agoHelpfull: Yes(5) No(1)
• 2 so that host and hostess are always included
• 11 years agoHelpfull: Yes(2) No(5)
• ans :3 as s given is a set of people
  
• 11 years agoHelpfull: Yes(1) No(2)
• Can any one explain ???
• 11 years agoHelpfull: Yes(0) No(0)