My Math Forum Urns and balls

 Probability and Statistics Basic Probability and Statistics Math Forum

 October 27th, 2014, 07:04 AM #1 Banned Camp   Joined: Dec 2013 Posts: 1,117 Thanks: 41 Urns and balls Hi, It is not a homework. So do not hurry to answer. Take your time. There are 14 urns. Each urn could cointain at most 5 balls. We place randomly 20 balls in the 14 urns. We choose randomly one urn out of 14 and we place the first ball. We do the same process for the remaining balls until we run out of the balls. What is the probability that at the end of the process that at least one urn contains at least 3 balls? What for at least one urn contains at least 4 balls or more? Hard one? Thank you
 October 27th, 2014, 11:00 AM #2 Math Team   Joined: Apr 2010 Posts: 2,780 Thanks: 361 We've currently got your question in our Q&A thread. Could you clarify there?

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