The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 19. What is the middle number?  Select: A) 27 B) 28 C) 29 D) 26 E) 25
Explanation:   The total of seven numbers = 7X18 = 126   The total of first 3 and last 3 numbers is = 3 X 14+3 X 19 = 99   So, the middle number is (126 – 99 ) = 27   27nswer: 27
<result>A</result>
The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 19. What is the middle number?