1988 AJHSME Problems/Problem 18
Problem
The average weight of boys is pounds and the average weight of girls is pounds. The average weight of the children is
Solution
Let the boys have total weight and let the girls have total weight . We are given
We want the average of the children, which is From the first two equations, we can determine that and , so . Therefore, the average we desire is
See Also
1988 AJHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 17 |
Followed by Problem 19 | |
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