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 years, then what is the age of the
third child?​

Answer 1

Answer:

Let children 1 2 3

then 1+2+3/3=13.5

1+2+3=13.5*3=40.5

and. 1+2 /2=25

1+2=50

hence. 3 =50-40.5