Question 852383
If 85% of your grade is 67, what do you need on the other 15% to have an average of 72%?
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Let's say there are a thousand points in the class.  Out of 850 already awarded, you have 569.5 (67*85=5695)
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You're after 72% of 1000, or 720. 
720.0 - 569.5 = 150.5
You need 100%.  All 34.  Study hard!