Phone Directory

United States
April 8, 2007 12:39pm CST
There is a town in Texas where 5% of all people living there have unlisted phone numbers. If you selected 100 names at random from the towns phone directory, on average, how many of these people would have unlisted phone numbers?
1 response
• United States
9 Apr 07
Zero! Because if its unlisted it wouldnt be in the book! yay