document.write( "Question 1114054: Lizzy went bowling. She bowled 3 games with a mean score of 84. If her first 2 games had a mean of 81, what would she have to bowl in her final game? \n" ); document.write( "
Algebra.Com's Answer #729076 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Here is a method you can use for problems like this involving the average (mean) of numbers that are close together.... \n" ); document.write( "Her average was 84; her average for the first two games was 81. \n" ); document.write( "That average for her first 2 games is 3 less than her final average. \n" ); document.write( "That means that after the first 2 games she is a total of 2*3=6 points short of her final average. \n" ); document.write( "And that means she has to be 6 points ABOVE her final average in the third game. \n" ); document.write( "So the score in her last game must be 84+6 = 90. \n" ); document.write( " |