document.write( "Question 971986: Deon's average mark for his first two spelling tests is 10.After the third test,his average mark for the three tests is 9 .what is his mark on the third test? \n" ); document.write( "
Algebra.Com's Answer #594393 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! total for the three test is 9*3 = 27 \n" ); document.write( "total for the first two tests is 10*2 = 20, therefore \n" ); document.write( "score on third test is 27 - 20 = 7 \n" ); document.write( " \n" ); document.write( " |