Question

233. 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) 10 years
(C) 16 years (D) 15 years
(D)
(B) 14 years​

Answer 1

Answer:

D) 15 years

Explanation:

Answer 2

Answer:

15 yrs

Explanation:

ratio 3:5:7

a/q avg is 25 so

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

15x/3=25

x= 5

age of youngest

3×5

15 yrs