The average age of three boys is 10 years and their ages are in proportion 2:4:4. What is the age in years of the youngest boy?
Pick: A) 6 B) 9 C) 8 D) 4 E) 2
2x + 4x + 4x = 30   x =3   2x = 6   6nswer: 6
<result>A</result>
The average age of three boys is 10 years and their ages are in proportion 2:4:4. What is the age in years of the youngest boy?