The average of 9 numbers is 13.8. If the average of the first five numbers is 13.6 and that of the last five numbers is 13.4,then the middle number is?
Choose the correct choice from the following options
A) 11.8
B) 10.8
C) 9.8
D) 8.8
E) 8.6
Middle number = 13.6*5 + 13.4*5- 13.8*9 = 68+67-124.2= 
<gadget id="calculator">68+67-124.2</gadget>
<output>10.8</output>
10.8   Answer is 10.8
<result>B</result>
The average of 9 numbers is 13.8. If the average of the first five numbers is 13.6 and that of the last five numbers is 13.4,then the middle number is?