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The best way to find the arithmetic mean of miles per gallon is first to top off the gas tank, reset the trip odometer. Travel say 200 miles on various terrains. Top off the gas tank again. Read the exact gallons dispensed to top off and the exact miles on the trip odometer. Let them be M1 miles and G1 gallons. Do this kind of experiments and get M2, G2, M3, G3, .... etc. Get at least five pairs of numbers. Now add M1 + M2 + M3 + M4 + M5 and divide this by G1 + G2 + G3 + G4 + G5. What you get is the arithmetic mean of miles per gallon.

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13y ago

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