Which Sock??

Written on 12:17 am by Vja Students

Your sock drawer contains ten pairs of white socks and ten pairs of black socks. If you're only allowed to take one sock from the drawer at a time and you can't see what color sock you're taking until you've taken it, how many socks do you have to take before you're guaranteed to have at least one matching pair?

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18 Comments

  1. divyaas | 6 September 2008 at 6:15 pm

    i think it shud b three...

     
  2. John Doe | 7 September 2008 at 1:04 pm

    3 if all the white or black pairs are identical else 21 if none are.

     
  3. NEO | 17 September 2008 at 5:28 am

    3 tries. 1st black 2nd white 3rd black or white

     
  4. NEO | 17 September 2008 at 5:28 am

    3 tries. 1st black 2nd white 3rd black or white

     
  5. jaishu | 22 September 2008 at 5:52 pm

    [b]...buddy..its three...!!!![:)]

     
  6. Unknown | 3 October 2008 at 1:55 am

    11 times

     
  7. Vijaykumar S Haregaonkar | 6 October 2008 at 11:30 pm

    3 tries..only

     
  8. Unknown | 9 October 2008 at 7:47 pm

    3 socks

     
  9. Unknown | 15 October 2008 at 9:03 pm

    21 if pair of socks are not identical,else 3.

     
  10. narotam | 3 December 2008 at 3:54 pm

    3

     
  11. Anonymous | 11 January 2009 at 11:15 am

    3...

     
  12. Anonymous | 11 January 2009 at 11:15 am

    3...

     
  13. Nikhil | 27 April 2009 at 9:48 pm

    This comment has been removed by the author.

     
  14. Yogesh | 3 May 2009 at 8:53 am

    3

     
  15. arun | 12 June 2009 at 5:45 pm

    22.. pigeon hole principle applies here

     
  16. Unknown | 5 September 2009 at 3:57 pm

    11

     
  17. Vinay | 8 October 2009 at 11:32 pm

    may 3

     
  18. Karthik Kamatam | 9 January 2010 at 10:17 pm

    PLZ VISIT SITE OF OUR MANAGEMENT FEST, MBA-NIT WARANGAL.
    http://www.orkut.co.in/Main#Community?cmm=95116684

     

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