Please Help ! How is GRE score determined

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Hello great mylotters. I have a question about scoring in GRE. The school i'm eyeing for my graduate studies stipulates a minimum of a 520 score in GRE. Now after preparations, i attempted the first practice test in the ETS POWERPREP, and i scored 360 verbal and 580 quantitative, lets assume i score 5/5 in AWA, how will this score be aggregated. I want to know this so that i'll know how close i am to the required 520 by the school. Thanks and happy mylotting!