a box contains 12 marbels of 3 different colours green,yellow and blue 4each,if you were to close your eyes and pick them at random how many marbels must you take out to be sure that there are at least two of each colour among the marbels you picked out?

• 10 marbles.
  
  Green marbles = 4
  Yellow marbles = 4
  Blue marbles = 4
  
  So, if we pick 8 marbles randomly, there may be a chance we chose 4marbles from one color and 4marbles from one color.
  
  If we pick 9 marbles randomly means, there may be a chance we chose 4marbles from one color and 4marbles from one color and 1 marble from one color.
  
  But, if we pick 10 marbles randomly, we sure that there are at least two of each color among the marbles you picked out.
  
  
• 12 years agoHelpfull: Yes(80) No(18)
• In the first three pickings you may get 1 of each colour, on the 4th pick there will be at least two of one colour. Therefore,the answer is 4.
• 12 years agoHelpfull: Yes(9) No(25)
• you have 12 marbles:
  g g g g y y y y b b b b
  
  In order to definitely 2 of one color --
  
  So you take out g y b. Then the next one you take will be the 2nd for one of these marbles. So you need to take out 4.
• 11 years agoHelpfull: Yes(2) No(5)
• 5 marbels.
  If i pick 4 worst case is all the 4 marbels are of same color but when i pick the 5th one, it must be of 2nd color.
• 11 years agoHelpfull: Yes(1) No(6)
• 10 marbles.
  
  Green marbles = 4
  Yellow marbles = 4
  Blue marbles = 4
  
  at least two of each colour among the marbels you picked out
  2!=2
  12-2=10
• 10 years agoHelpfull: Yes(1) No(0)
• answer is 4
  becoz if u pick 3 marbal then it may be same or mayn't be same..
• 10 years agoHelpfull: Yes(0) No(4)
• In the first three pickings you may get 1 of each colour, on the 4th pick there will be at least two of one colour. Therefore,the answer is 4.
• 10 years agoHelpfull: Yes(0) No(4)