a box contains 12 marbles of three colors – green, yellow & blue – 4 each. If you were to close your eyes & pick it up, how many marbles must you take out to be sure that there are at least 2 of one colour among the marbles picked out

• 4 marbles.
  If first 3 marbles are of 3 different colours, then 4th marble will definitely make a pair of same colour with one of the marbles.
• 13 years agoHelpfull: Yes(23) No(7)
• 5 marbles
  each 4 have same colours
  wwhen we pick up the marble there is a possibility that 4 have same colour
  when we pick up the 5th one the colour should be different.
  so at least 5 marbles have to take out..
• 11 years agoHelpfull: Yes(4) No(10)