document.write( "Question 761524: a student scores 72 out of 100 on a test. if the maximum score on the next test is also 100 points, what score does the student need to maintain and average of 81? \n" ); document.write( "
Algebra.Com's Answer #463289 by ramkikk66(644)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "The student needs to maintain an average of 81 in 2 tests.\r
\n" ); document.write( "\n" ); document.write( "By definition, average of n items is the sum of the n numbers divided by n.\r
\n" ); document.write( "\n" ); document.write( "Average = sum of scores in 2 tests / 2 \r
\n" ); document.write( "\n" ); document.write( "\"81+=+Sum+%2F+2\"\r
\n" ); document.write( "\n" ); document.write( "So the student needs to score a total of \"81+%2A+2+=+162\" in the 2 tests.\r
\n" ); document.write( "\n" ); document.write( "He has already scored 72 in the 1st test.\r
\n" ); document.write( "\n" ); document.write( "How much should he score in the 2nd test? Just subtract from the total (162 - 72), to get 90.\r
\n" ); document.write( "\n" ); document.write( "So he should score 90 in the second test to get an average of 81.\r
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\n" ); document.write( "\n" ); document.write( "(Check out problem number 761220 also, to understand how averages work.)\r
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