document.write( "Question 644499: The day of a quiz, only Michelle was absent. The average grade of the other students was 85. When Michelle took a make-up quiz her grade was a 30 which lowered the class average to 80. How many students are in the class? \n" ); document.write( "
Algebra.Com's Answer #405068 by Alan3354(69443)\"\" \"About 
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The day of a quiz, only Michelle was absent. The average grade of the other students was 85. When Michelle took a make-up quiz her grade was a 30 which lowered the class average to 80. How many students are in the class?
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\n" ); document.write( "n = # of others
\n" ); document.write( "(n*85 + 30)/(n+1) = 80
\n" ); document.write( "85n + 30 = 80n + 80
\n" ); document.write( "5n = 50
\n" ); document.write( "n = 10 others, + Michelle = 11 students
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