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http://img232.imageshack.us/img232/1...0952623pmb.png thanks

Quote: Originally Posted by champrock http://img232.imageshack.us/img232/1...0952623pmb.png thanks Champrock, If r is the mode, then p(r) > p(r-1) and p(r) > p(r+1). Plug in the definition of p, do lots of cancellation, and you will find the answer.