Better Fuel Economy » Mathematics http://www.inveighed.com Thu, 29 Jul 2010 16:19:39 +0000 http://wordpress.org/?v=2.9 en hourly 1 In a fuel economy study, each of 3 race cars is tested using 5 different brands of gasoline at 7 test sites?http://www.inveighed.com/in-a-fuel-economy-study-each-of-3-race-cars-is-tested-using-5-different-brands-of-gasoline-at-7-test-sites-2/ http://www.inveighed.com/in-a-fuel-economy-study-each-of-3-race-cars-is-tested-using-5-different-brands-of-gasoline-at-7-test-sites-2/#comments Sat, 15 May 2010 15:23:34 +0000 admin http://www.inveighed.com/in-a-fuel-economy-study-each-of-3-race-cars-is-tested-using-5-different-brands-of-gasoline-at-7-test-sites-2/



In a fuel economy study, each of 3 race cars is tested using 5 different brands of gasoline at 7 test sites located in different areas. If 2 drivers are used in this study and test runs are made once under distinct set of conditions, how many test runs are needed?

Originally posted 2009-04-19 02:14:01.

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