Win a copy of Event Streams in Action this week in the Java in General forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Devaka Cooray
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Bear Bibeault
Sheriffs:
  • Paul Clapham
  • Knute Snortum
  • Rob Spoor
Saloon Keepers:
  • Tim Moores
  • Ron McLeod
  • Piet Souris
  • Stephan van Hulst
  • Carey Brown
Bartenders:
  • Tim Holloway
  • Frits Walraven
  • Ganesh Patekar

Drawing without replacement rehearsel

 
Saloon Keeper
Posts: 3413
149
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Just read a nice one on the internet.

An urn contains colored balls, each color having the same number of balls.
If we add 20 balls of a new color, the chance of drawing two balls of the same color is unchanged. Drawing without replacement that is.

How many balls does the urn contain?
 
Piet Souris
Saloon Keeper
Posts: 3413
149
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Gosh, thousands of reactions, unbelievable. I'll contact you all personally, but as you will understand, gonna take me months!    
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!