Solved

Needs help in logic

Posted on 2011-09-05
7
298 Views
Last Modified: 2012-05-12
A={2,3,4}
B={3,4,5,6}
U={1,2,3,4,5,6,7,8,9}

P(B\A)

Answer is
{0,{5},{6},{5,6}}

Dont know how it get that needs help. Thanks.
0
Comment
Question by:mustish1
  • 3
  • 2
  • 2
7 Comments
 
LVL 20

Accepted Solution

by:
n2fc earned 500 total points
ID: 36485895
See:  http://www.mathgoodies.com/lessons/vol6/conditional.html
for explanation on conditional probabilty...

Rule to use is:
P(B | A)  =   P(A and B)  /  P(A)
0
 

Author Comment

by:mustish1
ID: 36485922
A={2,3,4}
B={3,4,5,6}
(A and B) = {2,3,4,5,6}

is this is correct. I am guessing here and means U.
0
 

Author Comment

by:mustish1
ID: 36485993
I think B\A = {5, 6} because 5 and 6 are elements of B but not of A.
power set of {5, 6} means ?
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:mustish1
ID: 36486214
The proper subsets of {5, 6} are {5} and {6} and then add in the empty set and the set itself.

i dont know if this is the way to do that.
0
 
LVL 20

Expert Comment

by:n2fc
ID: 36486231
I believe you are correct in your assumptions!  Thus you match the answer given in your original poser.
0
 
LVL 37

Expert Comment

by:TommySzalapski
ID: 36486784
Um, it's not conditional probability. The problem is asking for the power set of A\B
A\B is the set of elements that are in A and not in B so {5,6} in this case. And then the power set is all the possible subsets you can create from that set so of course it would be the { {Ø} {5} {6} {5,6} }
As long as you mean empty set when you write {0} then your answer is correct. I would use the Ø character instead to avoid confusion (Hold the Alt key down and press 0216 on the keypad in Windows to get that character).
0
 
LVL 37

Expert Comment

by:TommySzalapski
ID: 36486790
Sorry, of course in your question we had B\A (elements in B but not in A). I wrote A\B in the above post, but the definition is the same so don't let my typo confuse you.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Homework Help 5 73
Tembedded WB animatid gifs not animated on some pcs 2 73
How to access ANSI/IEEE Std 754 or equivalent information ? 3 46
Beginner to Unreal Engine 4 5 61
This is about my first experience with programming Arduino.
This article provides a brief introduction to tissue engineering, the process by which organs can be grown artificially. It covers the problems with organ transplants, the tissue engineering process, and the current successes and problems of the tec…
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …
In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…

867 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

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now