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November 16th, 2013, 12:10 AM  #1 
Senior Member Joined: Sep 2013 From: Earth Posts: 827 Thanks: 36  Probability
A box contains 10 cards with numbers 10,11,12,13,14,15,16,17,18,19 written on each card respectively. Two cards are drawn randomly from the box. Find the probability that the sum of the digits for both cards drawn is greater than 8.

November 16th, 2013, 12:27 AM  #2 
Senior Member Joined: Jun 2013 From: London, England Posts: 1,316 Thanks: 116  Re: Probability
Where are you getting stuck with this problem?


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