A family has three children with ages 5, 10, and 15. If a new child is born, what age must the new child be to maintain an average age of 10?
Practice Questions
1 question
Q1
A family has three children with ages 5, 10, and 15. If a new child is born, what age must the new child be to maintain an average age of 10?
5
10
15
20
Current total age = 5 + 10 + 15 = 30. To maintain an average of 10 with 4 children, total age must be 40. Therefore, the new child's age must be 40 - 30 = 10.
Questions & Step-by-step Solutions
1 item
Q
Q: A family has three children with ages 5, 10, and 15. If a new child is born, what age must the new child be to maintain an average age of 10?
Solution: Current total age = 5 + 10 + 15 = 30. To maintain an average of 10 with 4 children, total age must be 40. Therefore, the new child's age must be 40 - 30 = 10.
