The average age of 3 boys is 30 years and their ages are in the proportion 1:2:3. The age of the youngest boy is?
Choose one
A) 15years B) 20years C) 22years D) 25years E) 30years
Total age of 3 boys = 30*3= 
<gadget id="calculator">30*3</gadget>
<output>90</output>
90   ratio of their ages= 1:2:3   15yearsge of the youngest = 90*1/6= 
<gadget id="calculator">90*1/6</gadget>
<output>15</output>
15 years   15yearsnswer is 15years
<result>A</result>
The average age of 3 boys is 30 years and their ages are in the proportion 1:2:3. The age of the youngest boy is?