Solved

Permutation and Combination

Posted on 2016-10-09
9
110 Views
Last Modified: 2016-10-09
How to solve this equation?

c(8, 3) * c(8, 2) / c(16, 5) = 14/39 ≈ 0.36
0
Comment
Question by:Tommy Anderson
  • 3
  • 3
  • 2
9 Comments
 
LVL 94

Expert Comment

by:John Hurst
ID: 41835985
There is a standard formula for C(n,r) combinations in your text book.

Apply the formula to each term above (yields a number) and then multiply and divide for the answer
0
 

Author Comment

by:Tommy Anderson
ID: 41835996
unfortunately after 30 years I just dont remember anything in maths.
0
 
LVL 94

Accepted Solution

by:
John Hurst earned 250 total points
ID: 41835998
C(n,r) and P(n,r) are standard Combination and Permutation formulas. Look them up (Google or CRC Tables) and then solve the problem.
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 32

Expert Comment

by:phoffric
ID: 41836066
Your previous question shows that you know how to compute C(n,r) and know how to get the right answer for half of the questions.
https://www.experts-exchange.com/questions/28975162/Probability-question.html
(question deleted by the author).
0
 

Author Comment

by:Tommy Anderson
ID: 41836075
I copied it from the blackboard in the class. I dont know that you guys will be that hard on this question.
0
 

Author Comment

by:Tommy Anderson
ID: 41836077
My 30 years old notes when I was in school. Just dont remember.
0
 
LVL 32

Assisted Solution

by:phoffric
phoffric earned 250 total points
ID: 41836096
Your formula that you used in your deleted question is correct:
              n! 
C(n,r) = ------------
          (n-r)! r!

Open in new window

0
 
LVL 94

Expert Comment

by:John Hurst
ID: 41836104
Thanks. Remember to use Google or like reference for formulas as that will jog your memory. I have been out of school longer than you :)
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Finding a job can be stressful - searches, resume tweaks, and networking events can be super boring. Luckily we're here to help you land your dream job!
Stuck in voice control mode on your Amazon Firestick?  Here is how to turn it off!!!
Where to go on the main page to find the job listings. How to apply to a job that you are interested in from the list that is featured on our Careers page.
This is a video describing the growing solar energy use in Utah. This is a topic that greatly interests me and so I decided to produce a video about it.

713 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question