The average age of three boys is 40 years and their ages are in proportion 6:10:8. What is the age in years of the youngest boy?
Choices
A) 8  B) 10  C) 7  D) 6  E) 5
6x + 10x + 8x = 40   x =1.6   6x = 10   Answer:10
<result>B</result>
The average age of three boys is 40 years and their ages are in proportion 6:10:8. What is the age in years of the youngest boy?