The average age of three boys is 28 years and their ages are in the proportion 4 : 6 : 8. The age of the youngest boy is:  Choices.
A) 21 years	B) 18 years	C) 14 years	D) 9 years	E) None of these
Total age of 3 boys = (28 Ã— 3) years = 84 years. Ratio of their ages = 4 : 6 : 8.   Age of the youngest = (84 Ã— 3â„18) years = 14 years.   Answer 14 years
<result>C</result>
The average age of three boys is 28 years and their ages are in the proportion 4 : 6 : 8. The age of the youngest boy is: