The average of nine numbers is 14. The average of first four numbers is 11.5 and the average of last four numbers is 16.5. What is the middle number? Choose the correct choice from the following answers.
A) 14  B) 16  C) 15  D) 18  E) 17
The total of nine numbers = 9X14 = 126   The total of first 4 and last 4 numbers is = 4 X 11.5+4 X 16.5 = 112   So, the middle number is  (126 - 112 )= 
<gadget id="calculator"> (126 - 112 )</gadget>
<output>14</output>
14   14
<result>A</result>
The average of nine numbers is 14. The average of first four numbers is 11.5 and the average of last four numbers is 16.5. What is the middle number?