document.write( "Question 265238: If a student had taken six tests and recieved scores of 88, 73,81,83,79 and 94 what would the 7th test score have to be to have a mean score of 83? \n" ); document.write( "

Algebra.Com's Answer #195068 by drk(1908) $\"\"$ $\"About$

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We want an average of 83 for 7 tests. Think totals. So, 7 x 83 = 581 is what we need.
\n" ); document.write( "So far we have 88, 73, 81, 83, 79, 94 which sums to 498
\n" ); document.write( "The difference is 83.
\n" ); document.write( "So, you need an 83 on test 73 to get 83 in the class.
\n" ); document.write( "-----
\n" ); document.write( "alternate approach
\n" ); document.write( "(88+73+81+83+79+94+x)/7 = 83
\n" ); document.write( "(498+x) = 581
\n" ); document.write( "x = 83 \n" ); document.write( "

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