Problem:
Paula the painter had just enough paint for 30 identically sized rooms. Unfortunately, on the way to work, three cans of paint fell off her truck, so she had only enough paint for 25 rooms. How many cans of paint did she use for the 25 rooms?
Answer Choices:
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B.
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Solution:
The loss of 3 cans of paint resulted in 5 fewer rooms being painted, so the ratio of cans of paint to rooms painted is . Hence for 25 rooms she would require cans of paint.
\section*{OR}
If she used cans of paint for 25 rooms, then . Hence , and .
The problems on this page are the property of the MAA's American Mathematics Competitions