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 A bag contains 20 yellow balls, 10 green balls, 5 white balls, 8 black balls, and 1 red ball. How many minimum balls one should pick out in order to make sure that he gets at least 2 balls of same color. Last Post 05 Jul 2012 05:17 AM by Niel. 1 Replies. Sort: Oldest First Most Recent First
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hamza

New Member
Posts:62

 11 Jun 2012 07:04 PM A bag contains 20 yellow balls, 10 green balls, 5 white balls, 8 black balls, and 1 red ball. How many minimum balls one should pick in order to make sure that he gets at least 2 balls of same color.
Niel

Basic Member
Posts:193

 05 Jul 2012 05:17 AM Since there are five possible colors you must remove SIX balls to guarantee you have two balls of the same color. Yes, there is only about at 2.3% change that you will draw the red ball in your first five draws, but this is still a possibility. 5 chances in 210 possibles. Niel
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