The average age of three boys is 24 years and their ages are in proportion 2:4:8. What is the age in years of the youngest boy?	Choose the correct choice from the following options
A) 16  B) 9  C) 18  D) 12  E) 14
2x + 4x + 6x = 72   x =6   2x = 12   Answer: 12
<result>D</result>
The average age of three boys is 24 years and their ages are in proportion 2:4:8. What is the age in years of the youngest boy?