3 group shouls be divided.2 member are common in all.3 are common in each combination of 2 groups.in each group minimum how many member are there?

• i think it can be done easily be venn diagram and answer could be 4
• 11 years agoHelpfull: Yes(13) No(1)
• ans:4
  let ab common in both.
  To have 3 members common in each combination of 2 group,another 2 members are necessary.
• 11 years agoHelpfull: Yes(8) No(0)
• abc,abc,abc
  ab are common in all groups.
  if take combination of any 2 groups abc is common
• 11 years agoHelpfull: Yes(1) No(2)
• answer is abc=3.
• 11 years agoHelpfull: Yes(0) No(3)