document.write( "Question 1128134: 36 students took the ACT , with a mean score of 25.5. The boys had a mean score of 23.5 , while the girls had a mean score of 28. How many girls were in the group? \r
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document.write( "Thank you for your help \n" );
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Algebra.Com's Answer #744600 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! 36 students took the ACT , with a mean score of 25.5. The boys had a mean score of 23.5 , while the girls had a mean score of 28. How many girls were in the group? \n" ); document.write( "------------------- \n" ); document.write( "Total of scores of the 36 students:: 25.5*36 = 918 \n" ); document.write( "Total of boys scores:: 23.5B \n" ); document.write( "Total of girls scores:: 28G \n" ); document.write( "------------- \n" ); document.write( "Equations:: \n" ); document.write( "B + G = 36 \n" ); document.write( "23.5B + 28G = 918 \n" ); document.write( "----------------------- \n" ); document.write( "Modify to solve for \"B:: \n" ); document.write( "28B + 28G = 28*36 \n" ); document.write( "23.5B+28G = 918 \n" ); document.write( "------ \n" ); document.write( "Subtract and solve for \"B\" \n" ); document.write( "4.5B = 90 \n" ); document.write( "B = 20 (# of boys) \n" ); document.write( "----- \n" ); document.write( "Answer:: G = 36-B = 16 (# of girls) \n" ); document.write( "---------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------ \n" ); document.write( " |