document.write( "Question 724118: The mean of 15 scores is 82. If the mean of 7 of those scores is 78, what is the mean of the remaining 8 scores? \n" ); document.write( "
Algebra.Com's Answer #443614 by ankor@dixie-net.com(22740)\"\" \"About 
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The mean of 15 scores is 82. If the mean of 7 of those scores is 78, what is the mean of the remaining 8 scores?
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\n" ); document.write( "Let x = mean of remaining 8 scores
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\n" ); document.write( "\"%287%2878%29%2B8x%29%2F15\" = 82
\n" ); document.write( "multiply both sides by 15
\n" ); document.write( "7(78) + 8x = 15(82)
\n" ); document.write( "546 + 8x = 1230
\n" ); document.write( "8x = 1230 - 546
\n" ); document.write( "8x = 684
\n" ); document.write( "x = 684/8
\n" ); document.write( "x = 85.5 is the mean of the remaining 8 scores
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