A box contains 12 marbles of three different colors – Green, Yellow and Blue – 4 of each.

If you were to close your eyes and pick them at random, how many marbles must you take out to be sure that there are at least two of one color among the marbles picked out ?

The algebraic formula for this is x+1 where x is the number of variables (ie. the number of different colours).

So the answer is 3+1=4.

Posted by sassy on 2004-04-29 11:41:55