document.write( "Question 171498: Two high school classes took the same test. One class of 20 students made an average grade of 80%; the other class of 30 students made an average grade of 70%. What is the average grade for all students in both classes?
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document.write( "I got the answer of 75%. I'm not sure if that's correct. \n" );
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Algebra.Com's Answer #126629 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Two high school classes took the same test. One class of 20 students made an average grade of 80%; the other class of 30 students made an average grade of 70%. What is the average grade for all students in both classes? \n" ); document.write( "I got the answer of 75%. I'm not sure if that's correct. \n" ); document.write( "------------------- \n" ); document.write( "The weighted average is (20/50)*80 + (30/50)*70 = 74% \n" ); document.write( "========================================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |