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November 5th, 2013, 08:53 AM  #21  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,122 Thanks: 1003  Re: Probability help Quote:
Thanks again. Methinks I'm now ready to assist in handing out burgers to kids  
November 5th, 2013, 09:29 AM  #22 
Newbie Joined: Nov 2013 Posts: 8 Thanks: 0  Re: Probability help
If p1 = 1  p2, then it's opposite event, so the two last kids NOT getting the same type? Because in your first post, p1 meant two last kids getting same burger in general, and p2 meant two last kids getting the same burger after 18 coin flips. So the final formula for the problem is: p = 1  ( (n2)C(n/21) / 2^(n2) ) p.s: how do I write formulas in graphical form, as Pero did? I checked address of the image, and it has the formula in it which I can edit and it will generate new picture. How can I do this inside posts? 
November 5th, 2013, 12:04 PM  #23  
Senior Member Joined: Jun 2013 From: London, England Posts: 1,316 Thanks: 116  Re: Probability help Quote:
Quote:
Quote:
http://www.maths.tcd.ie/~dwilkins/LaTeXPrimer/  

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