Two Plus Two Newer Archives  

Go Back   Two Plus Two Newer Archives > General Gambling > Probability
FAQ Community Calendar Today's Posts Search

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #4  
Old 11-23-2007, 03:57 AM
MikeBandy MikeBandy is offline
Senior Member
 
Join Date: Sep 2002
Location: USA
Posts: 114
Default Re: This problem is pissing me off

[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
An urn contains 5 red balls, 3 white balls, and 6 blue balls. Determine the probability that they are drawn in the order of blue, white, and red, given that each ball is NOT replaced in the urn after it is drawn.

[/ QUOTE ]

6/14 * 3/13 * 5/12 = 15/364

[/ QUOTE ]

yeah, thats what I get. They come up with a different answer (14/2184). I didn't think I could be wrong cuz its such a simple problem. Its also not the first problem that their answer has been different from mine either, and the fact they don't show the solutions to all the problems is insanely stupid. This things going in the trash. Thanks for making me not feel like a ginormous retard, heh.

[/ QUOTE ]
It's clearly a mistake on the CD. Also, they should've shown the solutions to all problems. The correct answer is 15/364, as you've determined:

6/14 * 3/13 * 5/12 = 90/2184 = 15/364

The mistake that the author of the problem made is that the denominators were correctly multiplied, but the numerators were added, producing an answer of 14/2184. Even a mathematician or statistician can make a simple mistake.
Reply With Quote
 


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:22 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.