A family has three children with ages 10, 12, and 14. If they have another child, what age must the new child be for the average age of the family to be 12?
Practice Questions
1 question
Q1
A family has three children with ages 10, 12, and 14. If they have another child, what age must the new child be for the average age of the family to be 12?
8
10
12
14
Let the age of the new child be x. Then, (10 + 12 + 14 + x) / 4 = 12. Solving gives x = 8.
Questions & Step-by-step Solutions
1 item
Q
Q: A family has three children with ages 10, 12, and 14. If they have another child, what age must the new child be for the average age of the family to be 12?
Solution: Let the age of the new child be x. Then, (10 + 12 + 14 + x) / 4 = 12. Solving gives x = 8.
