document.write( "Question 692309: The average of the first three numbers was 11. The average of the other seven numbers was 12. What was the overall average of the numbers? \n" ); document.write( "
Algebra.Com's Answer #426964 by htmentor(1343)![]() ![]() You can put this solution on YOUR website! The average of the first 3 numbers = S3/3 = 11 -> S3 = 33 \n" ); document.write( "where S3 = the sum of the first 3 numbers \n" ); document.write( "The average of the other 7 numbers = S7/7 = 12 -> S7 = 84 \n" ); document.write( "So the overall average = (S3+S7)/10 = (33+84)/10 = 11.7 \n" ); document.write( " |