Question

22) The average age of three girls is 16. One girl is 18 and other is 13. How old is the third
girl?
​

Answer 1

Answer:

17

Step-by-step explanation:

1. (18+13+?)/3=16

2. 16×3=48

3. 48-(18+13)

4. 48-31=17

The 3rd girl's age is 17

Answer 2

Answer:

Step-by-step explanation:

Let the age of third girl be x

Average = Sum of observation / No. of observation

16=18+13+x/3

16*3=18+13+x

48=18+13+x

48=31+x

48-31=x

X=17

Therefore age of third girl is 17.

Thanks