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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.
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hamza
New Member
New Member
Posts:62

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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
    Basic Member
    Posts:193

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    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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    Forums > Engineering Questions and Answers > Puzzles