Question

3. The average age of the first three children in a class is 13.5 years. If the sum
of the ages of the first two children is 25
third child ?
0
(A) 15.5 years
(B) 13.2 years
(C) 12.8 years
(D) 12.5 years​

Answer 1

Answer:

a) 15.5 years

Step-by-step explanation:

Let the age of third child be x years.

Average age of three children = 13.5 years

(25 + x) / 3 = 13.5

25 + x = 13.5 × 3 = 40.5

x = 40.5 - 25 = 15.5 years