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Dtata Suffeciency. HELP !

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by heshamelaziry » Thu Aug 27, 2009 11:44 pm
The DS questions on Official guide, 12 edition, seem to be pretty difficult for the most part compared with questions from www.mba.com. Also, I find Officail Guide DS to be far difficult than PS.

Could I have yor opinions to get more insight about this.
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