My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
June 18th, 2012, 08:50 AM   #1
Newbie
 
Joined: Jun 2012

Posts: 2
Thanks: 0

18 baby blocks.... need help.

So each block obviously has 6 sides with a different letter.
All 18 blocks have the same 6 letters on them.
They are randomly placed in a line, with 6 sets of 3...... ( 3 A's 3B's 3Cs 3Ds 3Es and 3Fs..... for the sake of the argument ) They are covered up and randomly put in a line of 18.

What is the statistical chance that a person could pick 3 of the same letters on their first 3 picks?
Papa3x is offline  
 
June 18th, 2012, 09:06 AM   #2
Newbie
 
Joined: Jun 2012

Posts: 2
Thanks: 0

Re: 18 baby blocks.... need help.

Thank you.... seeing it written like that really cleared it up.... I'm no math whiz, but just in my head I was thinking it was like a 10,000 - 1 shot.
Papa3x is offline  
June 18th, 2012, 09:07 AM   #3
Global Moderator
 
greg1313's Avatar
 
Joined: Oct 2008
From: London, Ontario, Canada - The Forest City

Posts: 7,488
Thanks: 887

Math Focus: Elementary mathematics and beyond
Re: 18 baby blocks.... need help.

greg1313 is offline  
June 18th, 2012, 09:17 AM   #4
Global Moderator
 
greg1313's Avatar
 
Joined: Oct 2008
From: London, Ontario, Canada - The Forest City

Posts: 7,488
Thanks: 887

Math Focus: Elementary mathematics and beyond
Re: 18 baby blocks.... need help.

Sorry about the misplaced post - I made an error editing.
greg1313 is offline  
June 18th, 2012, 02:11 PM   #5
Global Moderator
 
greg1313's Avatar
 
Joined: Oct 2008
From: London, Ontario, Canada - The Forest City

Posts: 7,488
Thanks: 887

Math Focus: Elementary mathematics and beyond
Re: 18 baby blocks.... need help.

Quote:
Originally Posted by Papa3x
So each block obviously has 6 sides with a different letter.
All 18 blocks have the same 6 letters on them.
They are randomly placed in a line, with 6 sets of 3...... ( 3 A's 3B's 3Cs 3Ds 3Es and 3Fs..... for the sake of the argument ) They are covered up and randomly put in a line of 18.

What is the statistical chance that a person could pick 3 of the same letters on their first 3 picks?
I might have oversimplified what you are asking. Are the letters showing on the blocks determined at random? That is, the first block may show any of the six letters, the second block may show any of the six letters and so on, up to the eighteenth block?
greg1313 is offline  
June 18th, 2012, 02:25 PM   #6
Member
 
Joined: Jun 2012
From: UK

Posts: 39
Thanks: 0

Re: 18 baby blocks.... need help.

Quote:
Originally Posted by greg1313
Is that not the probability of 3 of one specific letter (e.g. "A"), rather than 3 all the same?
ghostwalker is offline  
June 18th, 2012, 02:33 PM   #7
Global Moderator
 
greg1313's Avatar
 
Joined: Oct 2008
From: London, Ontario, Canada - The Forest City

Posts: 7,488
Thanks: 887

Math Focus: Elementary mathematics and beyond
Re: 18 baby blocks.... need help.

Yes, that is for one letter specified before the drawing begins. The probability for all three the same, the letter being determined by the first pick, would be 1/136.
greg1313 is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
baby, blocks



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
exercise 6 chapter 1 Baby Rudin jefferson_lc Real Analysis 10 November 10th, 2014 11:58 AM
Blocks(Graph Theory) Fabion Applied Math 0 August 17th, 2012 02:55 PM
baby what's your number westworld Elementary Math 2 January 28th, 2012 06:56 PM
Baby Rudin - ch 2, ex 27 jefferson_lc Real Analysis 1 November 18th, 2010 08:23 AM
square root and jordan blocks m_t_m Linear Algebra 0 June 11th, 2010 04:21 AM





Copyright © 2017 My Math Forum. All rights reserved.