My Math Forum  

Go Back   My Math Forum > High School Math Forum > Probability and Statistics

Probability and Statistics Basic Probability and Statistics Math Forum

LinkBack Thread Tools Display Modes
October 27th, 2014, 07:04 AM   #1
Banned Camp
Joined: Dec 2013

Posts: 1,117
Thanks: 41

Urns and balls


It is not a homework. So do not hurry to answer. Take your time.

There are 14 urns.
Each urn could cointain at most 5 balls.
We place randomly 20 balls in the 14 urns.
We choose randomly one urn out of 14 and we place the first ball.
We do the same process for the remaining balls until we run out of the balls.
What is the probability that at the end of the process that at least one urn contains at least 3 balls?
What for at least one urn contains at least 4 balls or more?

Hard one?

Thank you
mobel is offline  
October 27th, 2014, 11:00 AM   #2
Math Team
Joined: Apr 2010

Posts: 2,780
Thanks: 361

We've currently got your question in our Q&A thread. Could you clarify there?
Hoempa is offline  

  My Math Forum > High School Math Forum > Probability and Statistics

balls, urns

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Select 5 balls from 12 balls, where some balls are identical Skyer Algebra 3 January 6th, 2014 11:26 AM
How many balls can fit into a jar daigo Algebra 2 July 8th, 2012 09:47 AM
Urns and Widgets. thesandbox Abstract Algebra 3 January 19th, 2012 01:49 PM
5 different balls distributed over 3 indistinguishable urns fc_groningen Advanced Statistics 3 January 29th, 2011 12:13 PM
An urn contains a azure balls and c carmine balls.. (Help) byron123 Advanced Statistics 2 September 10th, 2008 09:39 AM

Copyright © 2019 My Math Forum. All rights reserved.