document.write( "Question 725559: 2 pupils both score 6 out of 10 for a maths test. What would a 3rd pupil have to score to increase their average score by 1 mark?\r
\n" ); document.write( "\n" ); document.write( "is the answer 9/10 ? \r
\n" ); document.write( "\n" ); document.write( "(12/20 + x = 21/30 therefore x = 9/10) ?
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Algebra.Com's Answer #444202 by fcabanski(1391)\"\" \"About 
You can put this solution on YOUR website!
9/10 is correct.


\n" ); document.write( "You can also set it up as (6+6+x)/3 = 7 (since you know the new average has to be 7 and sum/# = avg).


\n" ); document.write( "12+x = 21 ---> x = 9 \n" ); document.write( "

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