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October 18th, 2010, 06:58 PM  #1 
Newbie Joined: Dec 2009 Posts: 7 Thanks: 0  5 same red ball and 5 same white ball
We have 5 SAME red ball and 5 SAME white ball, we need to make them into a circle. How many different arrangements possible? (if you can rotate one arrangement into another, they are counted as ONE arrangements) My answer is 16, anyone can confirm or reject? 

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ball, red, white 
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