document.write( "Question 872516: URGENT HELP NEEDED! PLEASE REPLY ASAP!\r
\n" ); document.write( "\n" ); document.write( "Some of the students were asked how much time they spent revising for the test.
\n" ); document.write( "10 students revised for 2.5 hours, 12 students revised for 3 hours and \"n\" students revised for 4 hours.
\n" ); document.write( "The mean time that these students spent revising was 3.1 hours.
\n" ); document.write( "Find n.
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Algebra.Com's Answer #526195 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "     61 + 4n = 3.1n + 68.2
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document.write( "         .9n = 7.2
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document.write( "           n = 8 \n" );
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