the thank giving banquet at no.2 ritcher street had 49 guests which consists of 6 statesmen,26 relatives ,19 people shake hands with other, some of which where b/w the atatesment alone ,some b/w relatives alone and some b/w the statesmen and relatives .how many shakehans will there be?
option
a) 342
b) 171
c) 180
d) 162

• there will be 19C2 handshakes
  
• 11 years agoHelpfull: Yes(22) No(1)
• Total persons are 19
  1 person shake hand with 18 persons
  2-17
  3-16
  4-15
  5-14
  6-13
  7-12
  8-11
  9-10
  10-9
  11-8
  12-7
  13-6
  14-5
  15-4
  16-3
  17-2
  18-1
  
• 11 years agoHelpfull: Yes(8) No(3)
• 171
  19+18+17+......+1
• 11 years agoHelpfull: Yes(3) No(1)
• 19*18=342 handshakes.
• 11 years agoHelpfull: Yes(1) No(1)