document.write( "Question 748630: The mean of five numbers is 12 . If the first four numbers are 7,9,10 and 13 , find the fifth number . \n" ); document.write( "
| Algebra.Com's Answer #455551 by Cromlix(4381)     You can put this solution on YOUR website! If the mean of 5 numbers is 12 \n" ); document.write( "then the full total must = 5 x 12 = 60 \n" ); document.write( "Adding up the given numbers 7,9,10 and \n" ); document.write( "13 totals 39. \n" ); document.write( "Therefore the missing number must be \n" ); document.write( "60 - 39 = 21. \n" ); document.write( " |