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Pairs of Socks (Posted on 2004-09-01) Difficulty: 3 of 5
You are in a pitch black room and need to get a pair of socks out of your drawer which can contain up to 100 socks. In the drawer is a mixture of black and white socks, and there's at least one pair of either color. If you choose two socks, the chance that you draw out a black pair is 2/3.

What is the chance that you draw out a white pair?

Bonus: what would the answer be if the drawer contained between 100 and 1000 socks?

See The Solution Submitted by SilverKnight    
Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
answer | Comment 19 of 20 |

The required chance of getting a white pair is 9/297.

  Posted by K Sengupta on 2008-01-25 05:51:25
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