Question:The average age of three boys is `25` years and their ages are in the proportion `3 : 5 : 7`. The age of the youngest boy is : 

A `21` years 
B `18` years 
C `15` years 
D `9` years 

+ Answer
C 

+ Explanation
Total age of 3 boys 

`= (25 xx 3)`years

`= 75` years.

`:.` Age of the youngest 

`= (75 xx 3/(15))`

`= 15` years.

+ Report

Md. Habib Ullah

Editor, VCampus

Your Name

Your Email

Type of Report
Spelling MistakeIncorrect AnswerGrammar MistakeContent MissingImproper Text FormatInsufficient AnswerDuplicate QuestionImproper Sentence StructureImproper Equation/FormulaOther

Description