The average of 11 numbers is 11. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is  Choose the correct option:  A) 10.4  B) 11.5  C) 81.5  D) 11.5  E) 21.5
Explanation:   Middle numbers = [(10.5 x 6 + 11.4 x 6) - 11 x 11] = 10.4.   10.4nswer: 10.4
<result>A</result>
The average of 11 numbers is 11. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is