CTK Exchange
CTK Wiki Math
Front Page
Movie shortcuts
Personal info
Awards
Terms of use
Privacy Policy

Interactive Activities

Cut The Knot!
MSET99 Talk
Games & Puzzles
Arithmetic/Algebra
Geometry
Probability
Eye Opener
Analog Gadgets
Inventor's Paradox
Did you know?...
Proofs
Math as Language
Things Impossible
My Logo
Math Poll
Other Math sit's
Guest book
News sit's

Recommend this site

Manifesto: what CTK is about Search CTK Buying a book is a commitment to learning Table of content Products to download and subscription Things you can find on CTK Chronology of updates Email to Cut The Knot Recommend this page

CTK Exchange

Subject: "Probability"     Previous Topic | Next Topic
Printer-friendly copy     Email this topic to a friend    
Conferences The CTK Exchange College math Topic #724
Reading Topic #724
Travis
guest
Jan-25-10, 00:15 AM (EST)
 
"Probability"
 
   The question that I am faced with, and am apparently way over my head with is: given a spinner numbered 1-10 and assuming that this spinner will be spun 22 times, what is the probability that the sum of all 22 spins will be equal or greater than 100?

now that I got myself into this problem, its driving me crazy and I really want to know how to solve it. So if any one could help it would be much appreciated.


  Alert | IP Printer-friendly page | Reply | Reply With Quote | Top
alexb
Charter Member
2468 posts
Jan-26-10, 08:44 AM (EST)
Click to EMail alexb Click to send private message to alexb Click to view user profileClick to add this user to your buddy list  
1. "RE: Probability"
In response to message #0
 
   Start with a simpler problem. Try, for example, two spins, and the sum between 2 and 20. Try three spins next. The think of ways of making 100 with denominations 1-10 in 10, 11, 12, spins, etc. Do not go for the whole problem in one big jump.


  Alert | IP Printer-friendly page | Reply | Reply With Quote | Top
Travis
guest
Jan-27-10, 09:48 PM (EST)
 
2. "RE: Probability"
In response to message #1
 
   I see, hopefully i might even be able to figure out a pattern with the increasing spins and extrapolate that to figure out the odds for my question.

Ill be back before the end of the week to let you know if I figure anything out, hopefully sooner.

Thanks.


  Alert | IP Printer-friendly page | Reply | Reply With Quote | Top

Conferences | Forums | Topics | Previous Topic | Next Topic

You may be curious to have a look at the old CTK Exchange archive.
Please do not post there.

Copyright © 1996-2018 Alexander Bogomolny

Search:
Keywords:

Google
Web CTK