Posted by stranger on Monday, April 8, 2013 at 8:48am.
A school is running a raffle for two prizes. 59 tickets were sold for the raffle, numbered 1,…,59. All the tickets are put into a hat and a teacher picks out two tickets which have numbers i and j from the hat. What is the expected value of i−j?

Probability  R, Sunday, April 14, 2013 at 3:06pm
20
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