Question

TE
12. The average age of three boys is 16 years, if their ages are in the ratio 4: 5:7, the age of the
boy is:
(a) 8 years
(b) 9 years
(c) 12 years
(d) 16 years
young
i
(
13. Average monthly income​

Answer 1

Answer:

let the age be 4x , 5x & 7x

Step-by-step explanation:

Average = (4x + 5x + 7x) / 3

16 = 16x /3 =》 16x = 16×3

x = 3

4x = 4×3 = 12 years.

option C is correct