The average of nine numbers is 15. The average of first four numbers is 11 and the average of last four numbers is 14. What is the middle number?
Choose the correct choice from the following.
A) 19	B) 20	C) 35	D) 31	E) 27
The total of nine numbers = 9X15 = 135   The total of first 4 and last 4 numbers is = 4 X 11+4 X 14 = 100   So, the middle number is  (135 - 100 )= 
<gadget id="calculator"> (135 - 100 )</gadget>
<output>35</output>
35   35
<result>C</result>
The average of nine numbers is 15. The average of first four numbers is 11 and the average of last four numbers is 14. What is the middle number?