GMAT Problem Solving Question 38: Average (arithmetic mean)

 
Try the following GMAT Problem Solving question that tests your understanding of the averages (arithmetic mean).

Question 38:

The Dunbar family consists of a mother, a father, and some children. The average age of the members of the family is $20$, the father is $48$ years old, and the average age of the mother and children is $16$. How many children are in the family?

1. $\quad 2$

2. $\quad 3$

3. $\quad 4$

4. $\quad 5$

5. $\quad 6$