An organisation has 3 committees, only 2 persons are members of all 3 committee but every pair of committee has 3 members in common. what is the least possible number of members on any one committee?

• Answer is 4.
  let A and B are common in all committee
  In 1 and 2 committee ,let say C is common
  In 2 and 3 committee,D is common
  In 1 and 3 committee, E is common.
  
  so, 1 committe has ABCE
  2 commitee has ABCD..so on.
  so the answer is minimum 4.
• 10 years agoHelpfull: Yes(23) No(0)
• ans:4
  A,B,C be commitees. 3 are common in A and B, out of which 2 are common in all A,B and C, and the one left is member of commitee A and not C. 3 are common in A and C, out of 2 are common in all, and left over one is member of 'A' and not 'C'. so, total members in 'A' are 2+1+1=4..
  similarly in other commitees B and C..
• 10 years agoHelpfull: Yes(3) No(1)
• 4
  2 common in all three
  and 2 for the condition of 3 members being common to every pair of committees
• 10 years agoHelpfull: Yes(2) No(0)
• 4 is correct
• 10 years agoHelpfull: Yes(1) No(0)
• actually the que was 2 persons are common for each committee...that is when comparing 1 and 2 2 persons are common ,comparing 2 and 3 2 persons are common,comparing 3 and 1 2 persons are common....totally when comparing 3 committees 3 persons are common in all the committees.so how many number of persons are there in the committee?
  ans is:4
  assume 1,2,3,4-first comm
  1,2,3,5-sec comm
  1,2,3,6-third comm....compare this ans with the que..
  
• 10 years agoHelpfull: Yes(0) No(0)
• the ans shud be 3 ..as
  let in 1st comm a b and c are there again in 2nd comm a b and c and also in 3rd comm a b and c are there..
  now matching the conditions a and b are common to all the 3 comm and taking any pair 3 are common which matches the requirement,, so ans shud be 3
• 10 years agoHelpfull: Yes(0) No(2)
• ans should be 3 because 2 are common in all and one is common in a pair so 3 people in each commitee
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• 4....ans is 4
  
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• consider 3 committee c1 c2 & c3
  
  all of them have fixed members & each pair of committee already has 2 persons in common so we only need 1 more member for any pair of committee to have 3 common members.
  so ans:3
• 10 years agoHelpfull: Yes(0) No(0)
• 1.ABCE
  2.ABDC
  3.ABED
• 10 years agoHelpfull: Yes(0) No(0)