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March 31st, 2015, 04:34 PM  #1 
Newbie Joined: Mar 2015 From: usa Posts: 2 Thanks: 0  probability formula needed
There are 13 marbles numbered 1 thru 13 in a bag. You are given 17 chances to choose number 3 marble replacement allowed. What is the formula? Thanks.
Last edited by mathminor; March 31st, 2015 at 05:13 PM. 
March 31st, 2015, 10:02 PM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 407  Hello, mathminor! Quote:
What is the probability that you do not get a "3" in 17 tries?  

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