March 19th, 2018, 10:25 PM  #1 
Newbie Joined: Feb 2018 From: Canada Posts: 28 Thanks: 2  Need help to edit my post.
Hi everyone, I am a new member. Can someone help me edit my post since I am a newbie so there is no edit button. Thank you. 
March 19th, 2018, 11:11 PM  #2 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,600 Thanks: 546 Math Focus: Yet to find out. 
There is an edit button, but it appears for a limited time only. 50% off your edit button! Come one come all, selling out sale, limited time available! 
March 19th, 2018, 11:18 PM  #3 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 1,995 Thanks: 132 Math Focus: Trigonometry 
Feels like a WinRar trial if you ask me...

March 20th, 2018, 12:18 AM  #4 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,822 Thanks: 1049 Math Focus: Elementary mathematics and beyond  Hello Shannonhaliwell and welcome to MMF! Provide a link to the post and instructions on what to edit and we'll make the changes for you. Last edited by greg1313; March 21st, 2018 at 06:09 PM. 
March 20th, 2018, 01:22 PM  #5  
Newbie Joined: Feb 2018 From: Canada Posts: 28 Thanks: 2  Quote:
The P.M.F. of Hypergeometric and Negative Binomial Distribution. This is my post. I would like to make some changes in my solution. Please help me. Thank you.  
March 20th, 2018, 02:59 PM  #6 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,822 Thanks: 1049 Math Focus: Elementary mathematics and beyond 
What changes would you like to make?

March 20th, 2018, 03:01 PM  #7 
Newbie Joined: Feb 2018 From: Canada Posts: 28 Thanks: 2  The joint P.M.F. of X and Y is as following: $$ P_{X,Y}(x,y) = \begin{cases}0 &\text{if X=0 and Y is finite} \\ P(X=0)=\dfrac{\dbinom{20}{0}\dbinom{80}{300}}{\dbinom{100}{30}} &\text{if X=0 and Y is infinite} \\P_X(x)P_{Y/X}(y/x) = \dfrac{\dbinom{20}{x}\dbinom{80}{30x}}{\dbinom{100}{30}} \dbinom{301}{41} 0.8^{304} 0.2^4 &\text{if }X=1,2,\dots ,20 \\ 0 &\text{ otherwise} \end{cases} $$ I might need to change in the future so it would be very helpful to have a permission to make my own changes. Thanks. 
March 20th, 2018, 03:21 PM  #8  
Senior Member Joined: Sep 2015 From: USA Posts: 2,009 Thanks: 1042  Quote:
If you feel you truly need to correct a post, you can always just post again, noting that the new post is a correction. Last edited by skipjack; March 20th, 2018 at 04:28 PM.  
March 20th, 2018, 03:46 PM  #9  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,762 Thanks: 860  Quote:
BUT seems to me that while there is no 2nd post (the original still there by itself) then edits should be allowed; cut off the edits when 2nd post is made.  
March 20th, 2018, 04:30 PM  #10 
Global Moderator Joined: Dec 2006 Posts: 19,178 Thanks: 1646 
I've done the edit for you, Shanonhaliwell.


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