Question

The average of the 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:

15.5 years

Step-by-step explanation:

Let x be the age of third child.

then

We know that

average=sum of given numbers/total number

=>13.5=25+x/3

If we solve this we got answer 15.5 years