The average of ten numbers is 210. The average of first five numbers is 40 and the average of last four numbers is 200. What is the middle number?	Choose the correct choice from the following answers:
A) A)200
B) B)2000
C) C)800
D) D)2100
E) E)1100
The total of ten numbers = 10X210 = 2100   The total of first 5 and last 4 numbers is = 5 X 40+4 X 200 = 1000   So, the middle number is  (2100 - 1000 )= 
<gadget id="calculator"> (2100 - 1000 )</gadget>
<output>1_100</output>
1100   1100
<result>E</result>
The average of ten numbers is 210. The average of first five numbers is 40 and the average of last four numbers is 200. What is the middle number?