The average of five numbers is 9. The average of first two numbers is 7 and the average of last two numbers is 12. What is the middle number?	Choose the correct choice from the following:  A) 7  B) 8  C) 5  D) 10  E) 6
The total of five numbers = 5x9 = 45   The total of first 2 and last 2 numbers is = 2 X 7+2 X 12 = 38   So, the middle number is  (45 - 38 )= 
<gadget id="calculator"> (45 - 38 )</gadget>
<output>7</output>
7   7
<result>A</result>
The average of five numbers is 9. The average of first two numbers is 7 and the average of last two numbers is 12. What is the middle number?