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(94.5*6 + 84.5*7 + 74.5*13 + 64.5*3 + 54.5*1)/(6+7+13+3+1)
(94.5*6 + 84.5*7 + 74.5*13 + 64.5*3 + 54.5*1)/(6+7+13+3+1)
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