document.write( "Question 251776: A class of 24 students took a test. The mean of the test scores for the whole class was 75 and the mean of the test scores for the 20 students who passed was 80. What was the mean of the test scores for the students who did not pass? *Show Work! \n" ); document.write( "
Algebra.Com's Answer #183465 by richwmiller(17219)\"\" \"About 
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let x=the average of the failing students
\n" ); document.write( "24-20=4 failing students\r
\n" ); document.write( "\n" ); document.write( "(4x+20*80)/24=75
\n" ); document.write( "1/24 (4 x+1600) = 75
\n" ); document.write( "x/6+400/6=75
\n" ); document.write( "multiply both sides by 6
\n" ); document.write( "x+400=75*6
\n" ); document.write( "x+400=(25*3)*(3*2)
\n" ); document.write( "x+400=(25*2)*(3*3)
\n" ); document.write( "x+400=50*9
\n" ); document.write( "x+400=450
\n" ); document.write( "x=50\r
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