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?
Select:
A) 6 B) 7 C) 5 D) 4 E) 3
A + B + 5 = 48   B + 5 + D = 45   A + D = 13   A – D = 3   A + D = 13   2D = 10   D = 5   Answer:5
<result>C</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?