Problem:
The average weight of boys is pounds and the average weight of girls is pounds. The average weight of the children is
Answer Choices:
A. pounds
B. pounds
C. pounds
D. pounds
E. pounds
Solution:
The total weight of the ten children is , so the average weight is or pounds.
The average weight of boys and girls is pounds. The other two boys would raise this average by or pounds.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions