The average of 1st 3 of 4 numbers is 6 and of the last 3 are 5. If the sum of the first and the last number is 11. What is the last numbers?	Choose the correct answer:  A) 4  B) 5  C) 6  D) 7  E) 8
4 + B + C = 18   B + C + D = 15   4 + D = 11   4 – D = 3   4 + D = 11   2D = 8   D = 4   4NSWER:4
<result>A</result>
The average of 1st 3 of 4 numbers is 6 and of the last 3 are 5. If the sum of the first and the last number is 11. What is the last numbers?