What's the average of 5 MPG and 10 MPG?
The math isn't quite obvious to me, but if you go out camping and get 5 MPG on the way to the campground and turn around and get 10 MGP on the way back, your average MPG won't be 7.5 as you would expe...
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Hope you aren't so bored on your camping trip that you need to keep busy with math problems. :B Just fill the tank until the money runs out.
