Question

The average age of 3 boys is 25 years & their age is in the proportion of 3 : 5 : 7, the age of youngest boy is

Answer 1

Step-by-step explanation:

let the common multiple be x

age of

boy 1=3x

boy 2=5x

boy 3=7x

according to the statement

(3x+5x+7x)/3=25

15x/3=25

5x=25

x=5

age of

boy 1=3*5=15yrs

boy 2=5*5=25 yrs

boy 3=7*5=35 yrs