The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers? Choose the correct choice from the following answers.
A) 3 B) 5 C) 9 D) 8 E) 2
A + 5 + C = 48   5 + C + D = 45   A + D = 13   A – D = 3   A + D = 13   2D = 10   D = 5   Answer:5
<result>B</result>
The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers?